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Testing the RC 1 and on the first IP backup job, we get this error:
Error code 479 at file copy-in.c, line 479 | Error description: could not create thread 8884
Error occured at about 25% of the running job.
Ran again the same job and it finished fine.
Preview versions can be unstable and still contain some bugs. We just published 22.214.171.124 RC008 which is much more stable.