This has happen twice now on two different sessions I made for PO&N TZ12.  When I unload a flat car the load disappear as well as the train control, but instead of the controls returning i get a “red bug alert” and I cannot move the engine.  I clicked the red bug and this is what I get.
Thread Exception: ER_NullReference,Line 224, File multipleindustrynew.gs
Stack dump:
<kuid:-19:10165>”Multiple Industry New”
Function $void@MultipleIndustryNew:
erformStopped(vehicle,string),line-1
Function $void@BaseIndustry:
erformStopped(vehicle,string),line 443
Anyway it may be the green Maine Central flat I’ve been using,:hehe: I’ll do some test with other flats.
Ern.
PS Ater testing it looks like its Operator Error
 in the setting up of possessing in industries.:hehe:
				
			Thread Exception: ER_NullReference,Line 224, File multipleindustrynew.gs
Stack dump:
<kuid:-19:10165>”Multiple Industry New”
Function $void@MultipleIndustryNew:
Function $void@BaseIndustry:
Anyway it may be the green Maine Central flat I’ve been using,:hehe: I’ll do some test with other flats.
Ern.
PS Ater testing it looks like its Operator Error
			
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