Need help with Change-A-File 2.15 please

[tomk@pro-nsdapple.cts.com (Tom Kelly)]

I am trying to use Change-A-File 2.15.
by Harold D. Portnoy
Does anyone know how to contact him?
I am send E-Mail to:75156.2436@compuserve.com H.PORTNOY@genie.geis.com,
(obtained from the docs) but that may be a very old address.
 
When I try to set the source or destination, I get the following error.
MLI ERROR $40
INVALID PATHNAME SYNTAX
 
My disk is /BLANK
It has one directory named TRYS
 
I have made the following attempts:
source     /
destination   /
 
 
source    /BLANK
destination    /BLANK
 
source    /BLANK
destination    /BLANK/TRYS
 
source    /BLANK/
destination    /BLANK/
 
source    /BLANK/
destination    /BLANK/TRYS/
 
The result is always the same.
MLI ERROR $40
INVALID PATHNAME SYNTAX
 
Can anyone help me?
What am I doing wrong?
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