diff --git a/src/encounter/encounter_io.f90 b/src/encounter/encounter_io.f90
index 9ab5947b1..33915313d 100644
--- a/src/encounter/encounter_io.f90
+++ b/src/encounter/encounter_io.f90
@@ -12,7 +12,7 @@
    use netcdf
 contains
 
-   module subroutine encounter_io_dump_storage_list(self, param, system)
+   module subroutine encounter_io_dump_storage_list(self, param)
       !! author: David A. Minton
       !!
       !! Dumps the time history of an encounter to file.
@@ -20,12 +20,21 @@ module subroutine encounter_io_dump_storage_list(self, param, system)
       ! Arguments
       class(encounter_storage(*)),  intent(inout)        :: self   !! Encounter storage object
       class(swiftest_parameters),   intent(inout)        :: param  !! Current run configuration parameters 
-      class(swiftest_nbody_system), intent(in), optional :: system !! Swiftest nbody system object
       ! Internals
+      integer(I4B) :: i
 
       ! Most of this is just temporary test code just to get something working. Eventually this should get cleaned up.
-
-
+      call self%nciu%initialize(param)
+      do i = 1, self%nframes
+         if (allocated(self%frame(i)%item)) then
+            select type(plplenc_list => self%frame(i)%item)
+            class is (symba_plplenc)
+               self%nciu%ienc_frame = i
+               call plplenc_list%write_frame(self%nciu,param)
+            end select
+         end if
+      end do
+      call self%nciu%close()
 
 
       return
@@ -42,12 +51,10 @@ module subroutine encounter_io_initialize_output(self, param)
       class(encounter_io_parameters), intent(inout) :: self    !! Parameters used to identify a particular NetCDF dataset
       class(swiftest_parameters),     intent(in)    :: param   !! Current run configuration parameters
       ! Internals
-      integer(I4B) :: nvar, varid, vartype
       real(DP) :: dfill
       real(SP) :: sfill
       logical :: fileExists
       character(len=STRMAX) :: errmsg
-      integer(I4B) :: ndims
 
       dfill = ieee_value(dfill, IEEE_QUIET_NAN)
       sfill = ieee_value(sfill, IEEE_QUIET_NAN)
@@ -151,6 +158,15 @@ module subroutine encounter_io_write_frame(self, iu, param)
       class(encounter_list),          intent(in)    :: self   !! Swiftest encounter structure
       class(encounter_io_parameters), intent(inout) :: iu     !! Parameters used to identify a particular encounter io NetCDF dataset
       class(swiftest_parameters),     intent(inout) :: param  !! Current run configuration parameters
+      ! Internals
+      integer(I4B)                                  :: i,old_mode, n
+
+      i = iu%ienc_frame
+      n = int(self%nenc, kind=I4B)
+      call check( nf90_set_fill(iu%ncid, nf90_nofill, old_mode), "encounter_io_write_frame_base nf90_set_fill"  )
+      call check( nf90_put_var(iu%ncid, iu%time_varid, self%t, start=[i]), "netcdf_write_hdr_system nf90_put_var time_varid"  )
+      call check( nf90_put_var(iu%ncid, iu%xhx_varid, self%x1(1, 1), start=[1, 1, i]), "netcdf_write_frame_base nf90_put_var xhx_varid"  )
+                 
 
       return
    end subroutine encounter_io_write_frame
diff --git a/src/modules/encounter_classes.f90 b/src/modules/encounter_classes.f90
index b3d913f02..585992384 100644
--- a/src/modules/encounter_classes.f90
+++ b/src/modules/encounter_classes.f90
@@ -63,6 +63,7 @@ module encounter_classes
       integer(I4B)      :: encid_varid               !! NetCDF ID for the encounter pair index variable
       integer(I4B)      :: nenc_varid                !! NetCDF ID for the number of encounters variable
       integer(I4B)      :: level_varid               !! NetCDF ID for the recursion level variable
+      integer(I4B)      :: ienc_frame                !! Current frame number for the encounter history
    contains
       procedure :: initialize => encounter_io_initialize_output !! Initialize a set of parameters used to identify a NetCDF output object
       procedure :: open       => encounter_io_open_file         !! Opens a NetCDF file
@@ -207,11 +208,10 @@ module subroutine encounter_check_sweep_aabb_single_list(self, n, x, v, renc, dt
          logical,      dimension(:), allocatable, intent(out)   :: lvdotr     !! Logical array indicating which pairs are approaching
       end subroutine encounter_check_sweep_aabb_single_list
 
-      module subroutine encounter_io_dump_storage_list(self, param, system)
+      module subroutine encounter_io_dump_storage_list(self, param)
          implicit none
          class(encounter_storage(*)),  intent(inout)        :: self   !! Encounter storage object
          class(swiftest_parameters),   intent(inout)        :: param  !! Current run configuration parameters 
-         class(swiftest_nbody_system), intent(in), optional :: system !! Swiftest nbody system object
       end subroutine encounter_io_dump_storage_list
 
       module subroutine encounter_io_initialize_output(self, param)