You said:

 SD> -If I do this using GoldEd+/EMX at the command prompt (using a
 SD> batch file), this error occurs.

 SD> -If I use FleetStreet, which is PM (GUI) based, this doesn't
 SD> happen.  I use a REXX script to do this under FleetStreet.

Check for multiple instances of the emx runtimes.  It could be that you
have a couple of different versions, and that the one GoldED is using makes
unzip barf. Squish nor Fleetstreet use emx, so unzip gets the one it likes.
 Once the dll gets pulled in, it isn't replaced in that session if another
program calls it.

-dw

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