On Friday afternoon I spent about 30 mins doing drawing edits.
I had to undo a single line placement and it instead undid everything since I opened the file.
I tried clicking redo and it all came back....
I thought this really odd, so I saved the file and closed it.
I re-opened it to test and 'undo' appeared to work as normal, ie the undo button would only undo one step at a time.
I continued working for another 30mins, went to undo something, and again, it undid everything for the last 30mins, only this time it crashed in the process. When I re-opened the file I'd lost 30mins of work.
I understand there is now an option to "set a mark" in the undo tool - however I have not used this.
I have also been using the undo tool from the "standard" toolbox menu, not the ribbon menu.
This is not normal behaviour obviously.
The undo tool in both places issues the 'undo' command, as does 'Ctrl + Z'.
Has this occurred with just one file or have you seen it with other files?
I suggest compressing the file before starting work on it, select all options.
OBD saves every time it spots a (very) brief pause in user activity.
As you work are you seeing the save icon (floppy disk) persisting? It should disappear as soon as you pause:
Regards
Marc
I have not had this error again yet - possibly a system reboot has fixed it?
I'll let you know if it happens again.