[Mobhack]

Make sure you have read the sticky thread " Windows Vista and Windows Seven Installation" at the top of the forum before installing to those operating systems.

The latest release (using the consolidated patch) now has a default path outside of the /program files/ hierarchy to ensure this, but if you used the old ones, it was defaulted to point to the normal program files that worked up to Windows XP.

Look at the path your installers are pointing to - if it is program files, then change it to the path recommended in the sticky thread.

You don't say if you are manually attempting to save the game, or if the message is coming from the auto-save to slot 0 the game does itself at each end turn. However since your problem seems to start half way through the scenario then it is unlikely to be the auto-save process itself that is at fault. If you had installed to the wrong path, it would have been complaining from the start...

In which case - your hard disk may well be corrupted, so it is always best to run the normal Windows disk maintenance utilities to fix any lost clusters etc. and if necessary, do a full surface test when any programmes start to give file I/O type errors.

Andy