SWI-Prolog Did You Know Did you know? don't use format/2 to print errors Search Documentation:
Pack logtalk -- logtalk-3.90.1/tests/prolog/predicates/char_code_2/tester.lgt

The current version of pack logtalk does not contain a file logtalk-3.90.1/tests/prolog/predicates/char_code_2/tester.lgt