GTGetSubGroups[GROUP] isn’t giving required subgroups in mathematica 9. There is a command GTGetSubGroups[■,□]. Which things have to be entered on those boxes inside the bracket?
Unfortunately, I don’t have Mathematica 9 installed. However, I don’t see any obvious part in the code which would not be compatible with older versions of Mathematica. I attach an example for GTGetSubGroups. Please check if your syntax was correct.