Yes, I did mean the Open Client (you don't need ODBC for DBD::Sybase) and sql.ini. It's just that sql.ini is called interfaces on Unix-like systems.

If you can connect with any SQL client on that box, then your parameter to DBI->connect is probably incorrect. If you have the server name registered, try not including the host and port, just use the name:

my $dbh = DBI->connect('dbi:Sybase:server=the_server', $user, $passwor
+d);
$dbh->do("use Reportingdb");  # guessing from your error message
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And see if that does the trick.