Fixed issue with mpi backward runs

src/releaseparticles_mpi.f90

@@ -84,6 +84,7 @@ subroutine releaseparticles(itime)
     first_call=.false.
   end if
 
+  mind2=memind(2)
 
   ! Determine the actual date and time in Greenwich (i.e., UTC + correction for daylight savings time)
   !*****************************************************************************

src/timemanager_mpi.f90

@@ -281,7 +281,7 @@ subroutine timemanager
 !*********************************************************************
 
     if (lmpreader.and.lmp_use_reader) then
-      if (itime.lt.ideltas) then
+      if (itime.lt.ideltas*ldirect) then
         cycle
       else
         goto 999