Well - first of all your problem is not with dbschema.pl itself, but with building the Sybase::xxx modules (aka "sybperl").

The problem is that you have a 64bit perl binary, but you have a 32bit version of ASE (and of OpenClient).

You have two choices:
1. Rebuild a 32bit perl binary, and the build sybperl.
2. Get the 64bit version of ASE/open client.

The 64bit version of ASE is available for free on linux x86 and x86-64 (this is the "Developer" Edition). Go to the Sybase home page (http://www.sybase.com) and follow the link for the 15.0.2 Developer Edition in the right-hand column.

Michael