This error message appears when the post processing module tries to access the folder containing the post processors. To resolve this, the Post processor must have Administrator privileges to access and the files. This is NOT the same as having a user account with administrator privileges. To give the Post Processor these privileges, proceed as follows.
Find the Post Processor icon on your Desktop
2. Right click the mouse, you will see this list
from the list choose Properties > Compatibility > towards the bottom of the dialogue check the box “Run this as an administrator”
3. Then click Apply then OK