6.4.1 two machines.  On machine B the home directory of users is a link to machine B ( /home is a link).

Now if i start the helpviewer on machine A ( local home ) all is good. If i start it on machine B then it fails with the
 error "Unable to start HTML 'help' server error: no child processes".

Then if I delete the .ph/helpviewer directory then restart the helpviewer on machine B it will work, once.  On the next 
launch it will fail again.  In between the first and second restart it was not started on machine A.

If I redo the same procedure but don't kill the first instance of the helpviewer I can then start any number of 
helpviwer.  It's only faster I exited the first instance that was started right after the deletion of the helpviewer 
directory that i'll get problem.