Since several have the problem, a brief explanation:
The problem is that the WT mods do not come with modified
.rpyc files. If the original
.rpyc files is in the
.rpa and a modder changes something, they must always do so based on the
.rpyc files from
.rpa file. And these new
.rpyc files have to be included then. Otherwise the saves will not work correctly. Reason is Python: Abstract syntax tree (
AST).
only modded rpy files => completely new rpyc files => incompatible with old saves
orignal rpyc files + modified rpy files => modified rpyc files => compatible with old saves
Apparently some modders don't know this or ignore it. In my mod, no
.rpcy files are needed because I don't change anything in the scripts that are relevant for saving. But WT mods must have
.rpcy files with them. If the save is not compatible, renpy tries to find an earlier point that fits. If no such one is found, the game crashes.