TLDR SOLVED: delete the problem instance from the room and replace it from the resource tree.
the error happens upon choosing to pack the room from your cmd line exe.
Maybe my room is bugged? (was actually an obj.)
I exported my rm_Init fine... It only has a few simple objects no tiles. The other has roof tiles.
EDIT: UPON FURTHER INSPECTION IT APPEARS THE ERROR ONLY HAPPENING WITH A SINGLE OBJECT CAUSING IT! :O
However idk why...
The object causing the crash when exporting to included file is called obj_teleportV_GO_INSIDE.
It has a parent called obj_teleport...
Invalid field access: name error persists.
Gonna have a look at my object's event's and see if removing parent helps...
- made a new room and copied instances from old room into it...
-deleted each instance type and ran the GMRoomPack.exe again until no error... (determining the object that causes the error).obj_teleportV_GO_INSIDE.
- changing object's parent didn't work, nor name... but after it was named obj_fred, i deleted the instance from the room and replaced it from the resource tree, THIS WORKED!