Player 1 Obat file different or corrupt

[fossiili]

I have played two games succesfully to the end with a good frend of mine ("succesfully" in technical sense, I lost bouth [img]/threads/images/Graemlins/Envy.gif[/img]).
I generated a new battle Syria-Israel 1973 and played it 2-3 turns. Now the problem appeared:
When I start the game and give orders to my troops, everything works well. It is a large region, so I must do other things meanwhile, so I click the uppward arrow etc. and close the computer. Then I come again and when I open the game, the message "Player 1 Obat file different or corrupt" appears and the gamefile opens not. The only possibility is to unzip it from the package. If I do everything at ones, stopping using --> arrow, no problems.
What to do?
I'm 71 so I become