Hello,
As you are already aware, your error 13 is a error setting permissions on a file.
Below your EPS you will have your in directory and your .PAT file will be extracted into that directory.
So ....
1. Check your permissions on the in directory.
2. Check that the .PAT file in question doesn't already exist in the in directory and isn't owned by another <sid>adm user.
KR,
Amerjit