Campaign acting weird

[TheLysander]

I am currently in a PBEM in around the summer of 44. I am playing the soviets, until now everything was going okay. However the latest turn everything has started to act weird. Some German units which were encircled have just simply vanished from the encirclement (Just the SS Panzer divisions it seems). As well as that whenever i conduct moves and attacks and try to save and or end the the turn i get the message of runtime error. Anyone have any ideas on what could be happening?

[morvael]

Maybe those units were withdrawn? I guess isolation is not preventing the game from withdrawing units...