Unknown procedure: module/2

Nice to know
1

For

ERROR:    catch/3: Unknown procedure: module/2
ERROR:      However, there are definitions for:
ERROR:            module/1

check that module/2 is the first Prolog statement in the Prolog source code file.

When creating temporary Prolog source code files there may be lines at the top, e.g.

:- working_directory(_,'C:/Users/Groot/Documents').

Later when the code needs to be made a proper module, module/2 is added e.g.

:- working_directory(_,'C:/Users/Groot/Documents').

:- module(do_something,[]).

but that will generate the error.

module/2 needs to be first, e.g

:- module(do_something,[]).

:- working_directory(_,'C:/Users/Groot/Documents').

I can’t count how many times I see the error and spend a few minutes checking the module/2 statement for errors when it is not the syntax for module/2 that is wrong, just moving the statement is all that is needed. :slightly_frowning_face: