diff --git a/examples/symba_mars_disk/param.in b/examples/symba_mars_disk/param.in
index 725927f1b..122d1a9d7 100644
--- a/examples/symba_mars_disk/param.in
+++ b/examples/symba_mars_disk/param.in
@@ -1,6 +1,6 @@
 !Parameter file for the SyMBA-RINGMOONS test
 T0             0.0 
-TSTOP          60000.0 
+TSTOP          10000.0 
 DT             600.0
 CB_IN          cb.in
 PL_IN          mars.in
diff --git a/examples/symba_mars_disk/testnetcdf.ipynb b/examples/symba_mars_disk/testnetcdf.ipynb
index a6d21ec0e..0b274f44b 100644
--- a/examples/symba_mars_disk/testnetcdf.ipynb
+++ b/examples/symba_mars_disk/testnetcdf.ipynb
@@ -35,30 +35,9 @@
      "text": [
       "Reading Swiftest file param.in\n",
       "\n",
-      "Creating Dataset\n"
-     ]
-    },
-    {
-     "ename": "UnicodeDecodeError",
-     "evalue": "'utf-8' codec can't decode byte 0x80 in position 0: invalid start byte",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mUnicodeDecodeError\u001b[0m                        Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-2-6fa7d06e00e8>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0msim\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mswiftest\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mSimulation\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mparam_file\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;34m\"param.in\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m \u001b[0msim\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mbin2xr\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m~/git/swiftest/python/swiftest/swiftest/simulation_class.py\u001b[0m in \u001b[0;36mbin2xr\u001b[0;34m(self)\u001b[0m\n\u001b[1;32m    172\u001b[0m     \u001b[0;32mdef\u001b[0m \u001b[0mbin2xr\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    173\u001b[0m         \u001b[0;32mif\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mcodename\u001b[0m \u001b[0;34m==\u001b[0m \u001b[0;34m\"Swiftest\"\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 174\u001b[0;31m             \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mds\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mio\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mswiftest2xr\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mparam\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    175\u001b[0m             \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'Swiftest simulation data stored as xarray DataSet .ds'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    176\u001b[0m         \u001b[0;32melif\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mcodename\u001b[0m \u001b[0;34m==\u001b[0m \u001b[0;34m\"Swifter\"\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/git/swiftest/python/swiftest/swiftest/io.py\u001b[0m in \u001b[0;36mswiftest2xr\u001b[0;34m(param)\u001b[0m\n\u001b[1;32m    697\u001b[0m         \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'\\nCreating Dataset'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    698\u001b[0m         \u001b[0mds\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mxr\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mopen_dataset\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mparam\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m'BIN_OUT'\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 699\u001b[0;31m         \u001b[0mds\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mclean_string_values\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mparam\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mds\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    700\u001b[0m     \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    701\u001b[0m         \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34mf\"Error encountered. OUT_TYPE {param['OUT_TYPE']} not recognized.\"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/git/swiftest/python/swiftest/swiftest/io.py\u001b[0m in \u001b[0;36mclean_string_values\u001b[0;34m(param, ds)\u001b[0m\n\u001b[1;32m    719\u001b[0m     \u001b[0mds\u001b[0m \u001b[0;34m:\u001b[0m \u001b[0mxarray\u001b[0m \u001b[0mdataset\u001b[0m \u001b[0;32mwith\u001b[0m \u001b[0mthe\u001b[0m \u001b[0mstrings\u001b[0m \u001b[0mcleaned\u001b[0m \u001b[0mup\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    720\u001b[0m     \"\"\"  \n\u001b[0;32m--> 721\u001b[0;31m     \u001b[0mds\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m'name'\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m  \u001b[0mds\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m'name'\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mstr\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mdecode\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mencoding\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;34m'utf-8'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    722\u001b[0m     \u001b[0mds\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m'particle_type'\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m  \u001b[0mds\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;34m'particle_type'\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mstr\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mdecode\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mencoding\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;34m'utf-8'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    723\u001b[0m     \u001b[0;32mif\u001b[0m \u001b[0;34m'origin_type'\u001b[0m \u001b[0;32min\u001b[0m \u001b[0mds\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/.conda/envs/cent7/2020.02-py37/swiftestOOF/lib/python3.7/site-packages/xarray/core/accessor_str.py\u001b[0m in \u001b[0;36mdecode\u001b[0;34m(self, encoding, errors)\u001b[0m\n\u001b[1;32m   2545\u001b[0m             \u001b[0mdecoder\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mcodecs\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mgetdecoder\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mencoding\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   2546\u001b[0m             \u001b[0mfunc\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;32mlambda\u001b[0m \u001b[0mx\u001b[0m\u001b[0;34m:\u001b[0m \u001b[0mdecoder\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mx\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0merrors\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0;36m0\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m-> 2547\u001b[0;31m         \u001b[0;32mreturn\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_apply\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfunc\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mfunc\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mdtype\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mnp\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mstr_\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m   2548\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   2549\u001b[0m     def encode(\n",
-      "\u001b[0;32m~/.conda/envs/cent7/2020.02-py37/swiftestOOF/lib/python3.7/site-packages/xarray/core/accessor_str.py\u001b[0m in \u001b[0;36m_apply\u001b[0;34m(self, func, dtype, output_core_dims, output_sizes, func_args, func_kwargs)\u001b[0m\n\u001b[1;32m    239\u001b[0m             \u001b[0moutput_sizes\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0moutput_sizes\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    240\u001b[0m             \u001b[0mfunc_args\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mfunc_args\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 241\u001b[0;31m             \u001b[0mfunc_kwargs\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mfunc_kwargs\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    242\u001b[0m         )\n\u001b[1;32m    243\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/.conda/envs/cent7/2020.02-py37/swiftestOOF/lib/python3.7/site-packages/xarray/core/accessor_str.py\u001b[0m in \u001b[0;36m_apply_str_ufunc\u001b[0;34m(func, obj, dtype, output_core_dims, output_sizes, func_args, func_kwargs)\u001b[0m\n\u001b[1;32m    136\u001b[0m         \u001b[0moutput_core_dims\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0moutput_core_dims\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    137\u001b[0m         \u001b[0mdask_gufunc_kwargs\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mdask_gufunc_kwargs\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 138\u001b[0;31m         \u001b[0;34m**\u001b[0m\u001b[0mfunc_kwargs\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    139\u001b[0m     )\n\u001b[1;32m    140\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/.conda/envs/cent7/2020.02-py37/swiftestOOF/lib/python3.7/site-packages/xarray/core/computation.py\u001b[0m in \u001b[0;36mapply_ufunc\u001b[0;34m(func, input_core_dims, output_core_dims, exclude_dims, vectorize, join, dataset_join, dataset_fill_value, keep_attrs, kwargs, dask, output_dtypes, output_sizes, meta, dask_gufunc_kwargs, *args)\u001b[0m\n\u001b[1;32m   1142\u001b[0m             \u001b[0mjoin\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mjoin\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   1143\u001b[0m             \u001b[0mexclude_dims\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mexclude_dims\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m-> 1144\u001b[0;31m             \u001b[0mkeep_attrs\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mkeep_attrs\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m   1145\u001b[0m         )\n\u001b[1;32m   1146\u001b[0m     \u001b[0;31m# feed Variables directly through apply_variable_ufunc\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/.conda/envs/cent7/2020.02-py37/swiftestOOF/lib/python3.7/site-packages/xarray/core/computation.py\u001b[0m in \u001b[0;36mapply_dataarray_vfunc\u001b[0;34m(func, signature, join, exclude_dims, keep_attrs, *args)\u001b[0m\n\u001b[1;32m    269\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    270\u001b[0m     \u001b[0mdata_vars\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;34m[\u001b[0m\u001b[0mgetattr\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0ma\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"variable\"\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0ma\u001b[0m\u001b[0;34m)\u001b[0m \u001b[0;32mfor\u001b[0m \u001b[0ma\u001b[0m \u001b[0;32min\u001b[0m \u001b[0margs\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 271\u001b[0;31m     \u001b[0mresult_var\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mfunc\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m*\u001b[0m\u001b[0mdata_vars\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    272\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    273\u001b[0m     \u001b[0;32mif\u001b[0m \u001b[0msignature\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mnum_outputs\u001b[0m \u001b[0;34m>\u001b[0m \u001b[0;36m1\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/.conda/envs/cent7/2020.02-py37/swiftestOOF/lib/python3.7/site-packages/xarray/core/computation.py\u001b[0m in \u001b[0;36mapply_variable_ufunc\u001b[0;34m(func, signature, exclude_dims, dask, output_dtypes, vectorize, keep_attrs, dask_gufunc_kwargs, *args)\u001b[0m\n\u001b[1;32m    722\u001b[0m             )\n\u001b[1;32m    723\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 724\u001b[0;31m     \u001b[0mresult_data\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mfunc\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m*\u001b[0m\u001b[0minput_data\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    725\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    726\u001b[0m     \u001b[0;32mif\u001b[0m \u001b[0msignature\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mnum_outputs\u001b[0m \u001b[0;34m==\u001b[0m \u001b[0;36m1\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
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-      "\u001b[0;32m~/.local/lib/python3.7/site-packages/numpy/lib/function_base.py\u001b[0m in \u001b[0;36m_vectorize_call\u001b[0;34m(self, func, args)\u001b[0m\n\u001b[1;32m   2195\u001b[0m                       for a in args]\n\u001b[1;32m   2196\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m-> 2197\u001b[0;31m             \u001b[0moutputs\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mufunc\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m*\u001b[0m\u001b[0minputs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m   2198\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   2199\u001b[0m             \u001b[0;32mif\u001b[0m \u001b[0mufunc\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mnout\u001b[0m \u001b[0;34m==\u001b[0m \u001b[0;36m1\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;32m~/.conda/envs/cent7/2020.02-py37/swiftestOOF/lib/python3.7/site-packages/xarray/core/accessor_str.py\u001b[0m in \u001b[0;36m<lambda>\u001b[0;34m(x)\u001b[0m\n\u001b[1;32m   2541\u001b[0m         \"\"\"\n\u001b[1;32m   2542\u001b[0m         \u001b[0;32mif\u001b[0m \u001b[0mencoding\u001b[0m \u001b[0;32min\u001b[0m \u001b[0m_cpython_optimized_decoders\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m-> 2543\u001b[0;31m             \u001b[0mfunc\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;32mlambda\u001b[0m \u001b[0mx\u001b[0m\u001b[0;34m:\u001b[0m \u001b[0mx\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mdecode\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mencoding\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0merrors\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m   2544\u001b[0m         \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   2545\u001b[0m             \u001b[0mdecoder\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mcodecs\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mgetdecoder\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mencoding\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mUnicodeDecodeError\u001b[0m: 'utf-8' codec can't decode byte 0x80 in position 0: invalid start byte"
+      "Creating Dataset\n",
+      "Successfully converted 2 output frames.\n",
+      "Swiftest simulation data stored as xarray DataSet .ds\n"
      ]
     }
    ],
@@ -67,6 +46,389 @@
     "sim.bin2xr()\n"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
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+       ".xr-var-dims {\n",
+       "  grid-column: 2;\n",
+       "}\n",
+       "\n",
+       ".xr-var-dtype {\n",
+       "  grid-column: 3;\n",
+       "  text-align: right;\n",
+       "  color: var(--xr-font-color2);\n",
+       "}\n",
+       "\n",
+       ".xr-var-preview {\n",
+       "  grid-column: 4;\n",
+       "}\n",
+       "\n",
+       ".xr-var-name,\n",
+       ".xr-var-dims,\n",
+       ".xr-var-dtype,\n",
+       ".xr-preview,\n",
+       ".xr-attrs dt {\n",
+       "  white-space: nowrap;\n",
+       "  overflow: hidden;\n",
+       "  text-overflow: ellipsis;\n",
+       "  padding-right: 10px;\n",
+       "}\n",
+       "\n",
+       ".xr-var-name:hover,\n",
+       ".xr-var-dims:hover,\n",
+       ".xr-var-dtype:hover,\n",
+       ".xr-attrs dt:hover {\n",
+       "  overflow: visible;\n",
+       "  width: auto;\n",
+       "  z-index: 1;\n",
+       "}\n",
+       "\n",
+       ".xr-var-attrs,\n",
+       ".xr-var-data {\n",
+       "  display: none;\n",
+       "  background-color: var(--xr-background-color) !important;\n",
+       "  padding-bottom: 5px !important;\n",
+       "}\n",
+       "\n",
+       ".xr-var-attrs-in:checked ~ .xr-var-attrs,\n",
+       ".xr-var-data-in:checked ~ .xr-var-data {\n",
+       "  display: block;\n",
+       "}\n",
+       "\n",
+       ".xr-var-data > table {\n",
+       "  float: right;\n",
+       "}\n",
+       "\n",
+       ".xr-var-name span,\n",
+       ".xr-var-data,\n",
+       ".xr-attrs {\n",
+       "  padding-left: 25px !important;\n",
+       "}\n",
+       "\n",
+       ".xr-attrs,\n",
+       ".xr-var-attrs,\n",
+       ".xr-var-data {\n",
+       "  grid-column: 1 / -1;\n",
+       "}\n",
+       "\n",
+       "dl.xr-attrs {\n",
+       "  padding: 0;\n",
+       "  margin: 0;\n",
+       "  display: grid;\n",
+       "  grid-template-columns: 125px auto;\n",
+       "}\n",
+       "\n",
+       ".xr-attrs dt,\n",
+       ".xr-attrs dd {\n",
+       "  padding: 0;\n",
+       "  margin: 0;\n",
+       "  float: left;\n",
+       "  padding-right: 10px;\n",
+       "  width: auto;\n",
+       "}\n",
+       "\n",
+       ".xr-attrs dt {\n",
+       "  font-weight: normal;\n",
+       "  grid-column: 1;\n",
+       "}\n",
+       "\n",
+       ".xr-attrs dt:hover span {\n",
+       "  display: inline-block;\n",
+       "  background: var(--xr-background-color);\n",
+       "  padding-right: 10px;\n",
+       "}\n",
+       "\n",
+       ".xr-attrs dd {\n",
+       "  grid-column: 2;\n",
+       "  white-space: pre-wrap;\n",
+       "  word-break: break-all;\n",
+       "}\n",
+       "\n",
+       ".xr-icon-database,\n",
+       ".xr-icon-file-text2 {\n",
+       "  display: inline-block;\n",
+       "  vertical-align: middle;\n",
+       "  width: 1em;\n",
+       "  height: 1.5em !important;\n",
+       "  stroke-width: 0;\n",
+       "  stroke: currentColor;\n",
+       "  fill: currentColor;\n",
+       "}\n",
+       "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;name&#x27; (id: 1521)&gt;\n",
+       "array([&#x27;Mars&#x27;, &#x27;Body2&#x27;, &#x27;Body3&#x27;, ..., &#x27;UNNAMED&#x27;, &#x27;UNNAMED&#x27;, &#x27;UNNAMED&#x27;],\n",
+       "      dtype=&#x27;&lt;U15&#x27;)\n",
+       "Coordinates:\n",
+       "  * id       (id) int32 0 1 2 3 4 5 6 7 ... 1514 1515 1516 1517 1518 1519 1520</pre><div class='xr-wrap' hidden><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'name'</div><ul class='xr-dim-list'><li><span class='xr-has-index'>id</span>: 1521</li></ul></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-fd42189d-be65-4f30-8b6f-44336a8ae934' class='xr-array-in' type='checkbox' checked><label for='section-fd42189d-be65-4f30-8b6f-44336a8ae934' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>&#x27;Mars&#x27; &#x27;Body2&#x27; &#x27;Body3&#x27; &#x27;Body4&#x27; ... &#x27;UNNAMED&#x27; &#x27;UNNAMED&#x27; &#x27;UNNAMED&#x27;</span></div><div class='xr-array-data'><pre>array([&#x27;Mars&#x27;, &#x27;Body2&#x27;, &#x27;Body3&#x27;, ..., &#x27;UNNAMED&#x27;, &#x27;UNNAMED&#x27;, &#x27;UNNAMED&#x27;],\n",
+       "      dtype=&#x27;&lt;U15&#x27;)</pre></div></div></li><li class='xr-section-item'><input id='section-c3403c70-dcfb-4729-af60-9e4b16107fe6' class='xr-section-summary-in' type='checkbox'  checked><label for='section-c3403c70-dcfb-4729-af60-9e4b16107fe6' class='xr-section-summary' >Coordinates: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>id</span></div><div class='xr-var-dims'>(id)</div><div class='xr-var-dtype'>int32</div><div class='xr-var-preview xr-preview'>0 1 2 3 4 ... 1517 1518 1519 1520</div><input id='attrs-a3659a13-f1b4-4e97-9e24-d4258b156b04' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-a3659a13-f1b4-4e97-9e24-d4258b156b04' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-017a187a-a23d-40b9-9d64-78c5880fe044' class='xr-var-data-in' type='checkbox'><label for='data-017a187a-a23d-40b9-9d64-78c5880fe044' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([   0,    1,    2, ..., 1518, 1519, 1520], dtype=int32)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-ba16413b-a131-42bf-92c3-18eb8be5a187' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-ba16413b-a131-42bf-92c3-18eb8be5a187' class='xr-section-summary'  title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
+      ],
+      "text/plain": [
+       "<xarray.DataArray 'name' (id: 1521)>\n",
+       "array(['Mars', 'Body2', 'Body3', ..., 'UNNAMED', 'UNNAMED', 'UNNAMED'],\n",
+       "      dtype='<U15')\n",
+       "Coordinates:\n",
+       "  * id       (id) int32 0 1 2 3 4 5 6 7 ... 1514 1515 1516 1517 1518 1519 1520"
+      ]
+     },
+     "execution_count": 6,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "sim.ds['name']"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 3,
@@ -78,7 +440,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 18,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [
     {
@@ -436,18 +798,18 @@
        "  fill: currentColor;\n",
        "}\n",
        "</style><pre class='xr-text-repr-fallback'>&lt;xarray.DataArray &#x27;name&#x27; ()&gt;\n",
-       "array(b&#x27;UNNAMED&#x27;, dtype=&#x27;|S32&#x27;)\n",
+       "array(b&#x27;1322&#x27;, dtype=&#x27;|S32&#x27;)\n",
        "Coordinates:\n",
-       "    id       int32 1885</pre><div class='xr-wrap' hidden><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'name'</div></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-b78c41e3-b163-4499-baaf-458a76370efe' class='xr-array-in' type='checkbox' checked><label for='section-b78c41e3-b163-4499-baaf-458a76370efe' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>b&#x27;UNNAMED&#x27;</span></div><div class='xr-array-data'><pre>array(b&#x27;UNNAMED&#x27;, dtype=&#x27;|S32&#x27;)</pre></div></div></li><li class='xr-section-item'><input id='section-4075ba08-77ee-4f66-a933-0d4a856e2453' class='xr-section-summary-in' type='checkbox'  checked><label for='section-4075ba08-77ee-4f66-a933-0d4a856e2453' class='xr-section-summary' >Coordinates: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>id</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>int32</div><div class='xr-var-preview xr-preview'>1885</div><input id='attrs-6caced43-38e6-41b0-b569-f60a26c018ad' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-6caced43-38e6-41b0-b569-f60a26c018ad' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-2150e85f-91f3-43a8-a680-1c1ae1ad765a' class='xr-var-data-in' type='checkbox'><label for='data-2150e85f-91f3-43a8-a680-1c1ae1ad765a' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array(1885, dtype=int32)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-a526347c-6d2e-4bb2-b40b-1951040bf082' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-a526347c-6d2e-4bb2-b40b-1951040bf082' class='xr-section-summary'  title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
+       "    id       int32 1321</pre><div class='xr-wrap' hidden><div class='xr-header'><div class='xr-obj-type'>xarray.DataArray</div><div class='xr-array-name'>'name'</div></div><ul class='xr-sections'><li class='xr-section-item'><div class='xr-array-wrap'><input id='section-87d3e1b3-5d0a-4369-88b8-ae2c3c3d1331' class='xr-array-in' type='checkbox' checked><label for='section-87d3e1b3-5d0a-4369-88b8-ae2c3c3d1331' title='Show/hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-array-preview xr-preview'><span>b&#x27;1322&#x27;</span></div><div class='xr-array-data'><pre>array(b&#x27;1322&#x27;, dtype=&#x27;|S32&#x27;)</pre></div></div></li><li class='xr-section-item'><input id='section-18f11108-ad53-422d-b3eb-c1e6d46f0c7b' class='xr-section-summary-in' type='checkbox'  checked><label for='section-18f11108-ad53-422d-b3eb-c1e6d46f0c7b' class='xr-section-summary' >Coordinates: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>id</span></div><div class='xr-var-dims'>()</div><div class='xr-var-dtype'>int32</div><div class='xr-var-preview xr-preview'>1321</div><input id='attrs-6b425d40-53d7-4976-8f36-b53d5cd1b8b5' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-6b425d40-53d7-4976-8f36-b53d5cd1b8b5' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-f3c915d6-6885-4824-9ef0-ec9ffa75626a' class='xr-var-data-in' type='checkbox'><label for='data-f3c915d6-6885-4824-9ef0-ec9ffa75626a' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array(1321, dtype=int32)</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-d219ffd5-629c-4105-8586-2eb0b9de97cc' class='xr-section-summary-in' type='checkbox' disabled ><label for='section-d219ffd5-629c-4105-8586-2eb0b9de97cc' class='xr-section-summary'  title='Expand/collapse section'>Attributes: <span>(0)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><dl class='xr-attrs'></dl></div></li></ul></div></div>"
       ],
       "text/plain": [
        "<xarray.DataArray 'name' ()>\n",
-       "array(b'UNNAMED', dtype='|S32')\n",
+       "array(b'1322', dtype='|S32')\n",
        "Coordinates:\n",
-       "    id       int32 1885"
+       "    id       int32 1321"
       ]
      },
-     "execution_count": 18,
+     "execution_count": 4,
      "metadata": {},
      "output_type": "execute_result"
     }
diff --git a/src/setup/setup.f90 b/src/setup/setup.f90
index c87aea559..342818672 100644
--- a/src/setup/setup.f90
+++ b/src/setup/setup.f90
@@ -237,7 +237,8 @@ module subroutine setup_body(self, n, param)
       class(swiftest_body),       intent(inout) :: self  !! Swiftest generic body object
       integer(I4B),               intent(in)    :: n     !! Number of particles to allocate space for
       class(swiftest_parameters), intent(in)    :: param !! Current run configuration parameter
-
+      ! Internals
+      integer(I4B) :: i
       self%nbody = n
       if (n <= 0) return
       self%lfirst = .true.
@@ -270,6 +271,13 @@ module subroutine setup_body(self, n, param)
 
       self%id(:)   = 0
       self%info(:)%name = "UNNAMED"
+      self%info(:)%particle_type = "UKNOWN"
+      self%info(:)%origin_type = "UNKNOWN"
+      self%info(:)%origin_time = -1.0_DP
+      do i = 1, n
+         self%info(i)%origin_xh(:) = 0.0_DP
+         self%info(i)%origin_vh(:) = 0.0_DP
+      end do
       self%status(:) = INACTIVE
       self%lmask(:)  = .false.
       self%ldiscard(:) = .false.