sumspice - command is not going to the isis3 cube processing history
sumspice history entry will be added to the input cubes after a successful run.
when sumspice is applied to an image, the keyword labels are updated with a Group=SumTimeHistory
But, the actual sumspice command is not reflected in the cube processing history,
this means when a user runs cathist, the sumspice command does not appear.
This is extremely misleading and is outside the isis application standard
commands for an Itokawa image (both executions should show up in the cube history after a successful run):
sumspice from=st_2391934788_v.cub sumfile=/work/projects/hayabusa/SUMFILES/N2391934788.SUM update=times
sumspice from=st_2391934788_v.cub sumfile=/work/projects/hayabusa/SUMFILES/N2391934788.SUM update=spice