Pardon me butting in Roy (and Mark),
 
=>Your bad line is          rem vol h:>g:\rg\misc\neccheck.vol
 
... but as I recall you cannot have redirection chars.  on a REM line
because dos will ignore the REM and attempt to perform what it considers to be
a command. This is why the use of
  REM > ZERO.FIL
does actually do something, and isn't simply ignored by dos.
I'm out of here, Bruce.