The only modification I've made except expansion is reading the offsets from the ROM in both FF6LE and Zone Doctor:
Event triggers: read offset from C0/BCBE
NPC: Read offset from C0/52C3 (this was in the original LE and Zone Doctor)
Exits: Read offset from C0/1A7E
tilemaps: Read offset from C0/2893 (only in LE+, still hardcoded in Zone Doctor+ due to complexity of code)
The purpose of this was to let people relocate the data where they want instead of being stuck the the offsets that were hardcoded in the source code. This works given you have not moved some code in bank C0 at the offset I specified. That been said, you Zone Doctor error looks like a event editor error, which I did not touched at all.
Edit: The expansion patch move the vanilla data as you said.
Event triggers: read offset from C0/BCBE
NPC: Read offset from C0/52C3 (this was in the original LE and Zone Doctor)
Exits: Read offset from C0/1A7E
tilemaps: Read offset from C0/2893 (only in LE+, still hardcoded in Zone Doctor+ due to complexity of code)
The purpose of this was to let people relocate the data where they want instead of being stuck the the offsets that were hardcoded in the source code. This works given you have not moved some code in bank C0 at the offset I specified. That been said, you Zone Doctor error looks like a event editor error, which I did not touched at all.
Edit: The expansion patch move the vanilla data as you said.
