diff --git a/python/swiftest/swiftest/io.py b/python/swiftest/swiftest/io.py
index db00655e3..01edfbf53 100644
--- a/python/swiftest/swiftest/io.py
+++ b/python/swiftest/swiftest/io.py
@@ -781,7 +781,6 @@ def swifter_xr2infile(ds, param, framenum=-1):
     RSun = np.double(cb['Radius'])
     param['J2'] = np.double(cb['J_2'])
     param['J4'] = np.double(cb['J_4'])
-    param['RHILL_PRESENT'] = "YES"
     
     if param['IN_TYPE'] == 'ASCII':
         # Swiftest Central body file
@@ -1228,7 +1227,6 @@ def swifter2swiftest(swifter_param, plname="", tpname="", cbname="", conversion_
         swiftest_param.pop('C', None)
     swiftest_param.pop('J2', None)
     swiftest_param.pop('J4', None)
-    swiftest_param.pop('RHILL_PRESENT', None)
 
     swiftest_param['DISCARD_OUT'] = conversion_questions.get('DISCARD_OUT', '')
     if not swiftest_param['DISCARD_OUT']:
@@ -1279,7 +1277,6 @@ def swiftest2swifter_param(swiftest_param, J2=0.0, J4=0.0):
        tmp = swifter_param.pop(key, None)
     swifter_param['J2'] = J2
     swifter_param['J4'] = J4
-    swifter_param['CHK_CLOSE'] = "YES"
     if swifter_param['OUT_STAT'] == "REPLACE":
         swifter_param['OUT_STAT'] = "UNKNOWN"
     swifter_param['! VERSION'] = "Swifter parameter file converted from Swiftest"