I had a case where in the control.lua#187 would throw an error that "count" has to be a positive integer, my quick and dirty fix was to change the condition in line 185 to check if "to_add" is bigger than 10.

Unfortunately i didn't backup an affected save game so you just have my word that there is a bug waiting to be discovered.

Can you roughly remember what happened to cause this? I can't really see a way this would happen normally, so if you did something special like placing down a new unit or migrating from the original then that'd be good to know.

I would say nothing special it happened while loading a deep storage unit on a space ship (3 belts using loaders), i will revert my changes an try to reproduce it, since i also don't get how it could happen.

i have the same error