This is popping up randomly while in 215.
Cannot open file: "C:\ProgramData\ddisoftware\Qimage\{q}work4.{q}".
The system cannot find the file specified.

Mack
That's a temp file and the only time I've seen that message is when an anti-malware program is intercepting the file and not allowing it to be saved.
Make sure you add an exclusion in your anti-malware program for the QU application folder, normally:
\programdata\ddisoftware\Qimage
Regards,
Mike