@1940

Hi.

The drive could well be OK but the problem could have been caused when the file was written.

I can think of several reasons this may occur including a forced shutdown of the program but it is not limited to just that scenario as several other situations could cause the same thing to happen.

If you have any BAK files you could try going back to a previously saved copy and see if that works.

If it doesn't, don't then save the project again and just shut down the program.

You can then go to the project folder and try deleting all files with H0 and HDP extensions. (Make a backup copy first by just copying the folder and pasting to another drive if possible to put back later)

Deleting those files should be safe to do as the program should make new versions of the files when you next open the project and hopefully the problem will go away.

If the program asks you if you wish to open a backup, select No. Try using the project again.

I have used that remedy myself in the past as recommended by John Baker.

Ray.