Hi mv_rajk,
I just wanted to add a little additional explanation. The Groups are 1-indexed, so the first one is index = 1, the second is index = 2, etc. Also, if you want to create a new Group, then make that new Group the default, you can use the following commands, since the "GroupCount" variable always returns the highest used Group index:
Call GroupCreate("NewGroupName")
Call GroupDefaultSet(GroupCount)
Regards,
Brad Turpin
DIAdem Product Support Engineer
National Instruments