According to Jim Pouliopoulos:

The GPC compiler sees the assign syntax as an "undeclared identifier".

Version 2.0 of GPC has no built-in `Assign' procedure.

[...] Is there a patch for GPC or another way around this problem?

You can

* upgrade your GPC to a more recent (beta or alpha) version that understands `Assign', see

ftp://agnes.dida.physik.uni-essen.de/gnu-pascal/beta/ /alpha/

or

* use a self-written `Assign', either that from the GPC Info documentation, chapter `Borland Pascal', or that from the `BPcompat' package at

ftp://agnes.dida.physik.uni-essen.de/gnu-pascal/contrib/

Hope this helps,

Peter -- Peter Gerwinski, Essen, Germany, free physicist and programmer Maintainer GNU Pascal - http://home.pages.de/~GNU-Pascal/ - 1 Oct 1997 PGP key fingerprint: AC 6C 94 45 BE 28 A4 96 0E CC E9 12 47 25 82 75 Fight the SPAM! - http://maps.vix.com/