Hi
It has nothing to do with the render config or setenv files.
Ulb313is001628 states that Windows cannot execute the batch file it has created. 'C:\RR_localdata\C_Ulb313is001628_A.bat'
I have taken a look at the change log of the function source and there was not a change for that function within the last year.
I think the fastest way to find the issue is a remote session this week.
Please send an email to support (at) RoyalRender.de to arrange a date.
regards,
Holger Schönberger
Please use the rrKnights Tavern
or our support system for new questions.