I haven’t been able to replicate the issue (and the line of code in question *should* contain a safeguard against problems like this happening). Can you find an exact way to reproduce it?
For what it’s worth, an official particle editor has been announced by GameMaker on the roadmap, and when that comes out in a few months I’ll probably be retiring this one.
Thanks for the hint, I did not know it is coming.
Anyway, I could replicate:
1. Set 2 emitters, 2 types (default and a new one)
2. Both link and set to stream (Idk if it has any meaning now)
3. Push "Reset System" at System tab
4, Set again new emitter and new type. At random places it gives this (or similar) GM message (eg. when I try to set the properties of Type)
I do hope it helps.
