Has LSTools been updated for the latest patch? Also, do you have a central thread with a link to updates?
I'm guessing it isn't yet. Great work on the tools so far, I poked around some older saves.
Expression: lengh <= 0x10000 && length >= paddingChars
Location ..\DivinityEd\variant.cpp (428)
This sounds like a bug. Can you attach a copy of your savegame?