Hello Amerjit,
I think you mean parameter, DIR_EPS_ROOT.
Both are good, DIR_TRANS and DIR_EPS_ROOT.
The messge in the subject is already the error of SAPCAR on os-level.
I've tried the touch with changing permissions, in both directories it was fine.
It is really strange, as alraedy mentioned, I can to the extracting via SAINT for one .SAR and there I also get the file in .PAT.
I've already removed it and did it again, and it really works for one file.
Kind regards