20507   zERR RENAME DIR INVALID

Source:  NSS, Common Layer, Rename

Explanation:  The selected directory cannot be renamed.

Possible Cause:  The directory is a root directory, and a root directory cannot be renamed. Or, an attempt was made to rename a directory to its parent. For example, rename \abc\def \abc

Action:  Make sure the directory is not a root directory. Make sure the new directory name has the complete path including the parent.