FL seems to think it's when the driver is already in use by another App ..
https://support.image-line.com/action/knowledgebase?ans=601

Make sure some other app isn't already using it (like Chrome, as mentioned in the article).
FWIW simply closing Chrome may not solve it once it has grabbed the driver; it doesn't let go in some people's experience.
Reboot the system, then launch RB before launching any other programs (including Chrome).
Does the error occur then?
The above was learned from a search on the error.
The error itself gives a good clue;
there is not enough menory for this task. Close other applications to expand memory and try again

Apparently, though, it's not about memory so much as the driver has been reserved, so sometimes closing other applications may release it, but for some, closing Chrome didn't release it, they had to reboot.

Last edited by rharv; 10/08/21 11:24 AM.

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