General Question Saved scenarios CTD

[easy4525]

When I play orbiter 2010-p1 and go to another planet or moon land save current or quick save scenario and return at a later time and reload everything loads fine. But if I go to a moon or planet with a load of cargo or even just one piece of cargo unload or use the cargo,save either way and come back later to the saved scenario or quick save scenario I get CTD . How do I stop the CTD ? Thank you for your help.