WitE2 games closes itself

[bighinvegas]

Playing an email game as the soviets in the first Soviet turn I deleted the depot in the Drohobycz hex # 184,190. The game then closed itself. I restarted and tried other nearby depots that are going to be captured by the Axis in the next turn and did not have that happen. I could zero the demand on the Drohobycz depot but deleting it causes the game to shut down. I repeated it twice, same result.