Hi Juan, the _bak file is created (normally only temporarily) when you are going to write over top of some existing file.

What happens is MoI first renames the existing file that is going to be overwritten to have that _bak file name, and it only removes that old already existing file once the new file has been successfully written.

That helps to protect against losing an existing file if there was some problem during the writing of the new version of it.


So something did go wrong with writing the new file though - it could be a bug but it can also be running out of disk space or running out of memory as well, and from what you are describing with a whole lot of things running at the same time it kind of sounds like it may have been a running out of memory problem...

Do you have plenty of RAM installed in your machine? If not it may be a good thing to upgrade on your machine especially if you're going to be running a lot of things all at the same time.


But I'm glad that the _bak file mechanism helped out though!

- Michael