# Pirin :
I've found that happens most when you add an item from a mod, save, then remove the item. It's not on the map anymore, but it's required by the mod after that point.
Also some sound mods worm their way into mission.sqm files, which is just ridiculous. So many times I've had to remove JSRS from missions because my friends insist on using that mod. :)
Yeah now I just load up without any client-side mods when editing (JSRS, Blastcore, any st stuff, etc).. that stupid JSRS thing has screwed me for the last time!