Just recently I have produced updated programmes with no problem. Now when I save the current programme with a different name (i.e. Rev 09, save as Rev 10). When I close MSP and try and open the Rev 10 it says there is an error and cannot open. I have triied saving the file in different locations and opening again, to no avail. Why does Rev 09 open? But Rev 10 with the exact same information report an error?