Auto saves delete SG file

[stormcricket]

Hello,
I have searched and no-one seems to have the same problem. It has happened in 1.127 and now with 1.130.
I can load a game, play for a couple of hours and then I will start getting the "Error: Unable to save game" message.
When I notice this I hit F12 and do the quick save and repeat this each time I notice the error message.
Now the odd bit is the error message wont always appear from that point, it is intermittent, the worst kind of fault.
When I go to the save games folder I notice that the save game file, sg01, is missing but the other save games sg00 and sg03 are still there. I think sg02 went the way of my main game.
I get the lastgame_backup file and I make a copy and then rename it to sg01 and all fixed, but I dont like having to go in and do the job of the auto save.
There will be a day when I forget and 400 days (so far) of trading, fighting and slaving will be lost and I will be highly annoyed.

Any ideas on why this happens?

I played Warband when it was first released and never had this problem, but have been away from the game for a while so missed the problems others have had with some of the other patches.
I am running Windows 7 x64, Native with no mods, have a GTS250 1Gb video card and the graphics are set on highest quality with no issues.
I am also running the game via steam but it is not a steam download, I paid my money to Taleworlds, figured they deserved full price for an awesome game.
As far as I can see the only issue I have is the save error.

 

[stormcricket]

Just as a bit of an update, I played for a couple of hours last night (Sept 1st) and no problems.

--edit Sept 3rd
and as an update to an update
played again last night Sept 2nd and I got the error unable to save message twice.
F12 and then alt tabbed out to have a look at the save games folder after each error message and after the 2nd message I noticed the sg01 save file was missing.
So I closed and exited from the game and recreated my file based on my last quick save and fired it up again and it is all good again.
I havent really been paying attention to when it happens, perhaps over the next week or so I will record what I was doing leading up to a failed save.
I have a nagging suspicion it is when I leave a particular city but will monitor it and report my progress.

I notice this post is getting some views but does anyone have any idea's on why this is happening?

--edit Sept 6th
I have been tracking when the errors occur and it only happens when I leave a city.
Unfortunately it isnt any one city, it can happen all over the map so no luck for an easy solution.
I deleted out all the other save files from  savegame folder , only leaving sg01 and started a new character.
I played for a few hours over the weekend and it only happened once, when I was leaving a city.
However it also failed to save when I exited the game and when I went to the save game folder there was the newgame file, and not an sg file other than my main game sg01.
I assume that with only sg01 in the folder then the next game would be sg00 and that could be why it failed this time. so I copied and then renamed the newgame file to sg00, but didnt get a chance to find out if there is anything wrong.

 

[stormcricket]

Well sg00 works fine.
I have gotten the save game error but so far the file hasnt been deleted.
I still hit f12 each time I see the error but havent needed to rename the backup file.
So I will check back from time to time and see if anyone else gets this problem, but my fix is working fine for me.