My guess is that the file you are trying to restore was never backed up to
the copy storage pool.  You can verify that using the Copied parameter
of the Query Content command.  The fact that you happen to see a file with the
same name on a copy pool volume does not mean that this file is the same
object.  The files you see on the primary and copy pool volumes are probably
different versions of the same file, and hence different objects as far as
restore processing is concerned.

Dave Cannon
ADSM Development