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sometimes when I run my program it works properly and sometimes when I try to run it
it can’t start to run
ERROR: Undefined procedure:
I restarted
I consulted
then I tried and I got answers
what is the problem here? what should i do?
I have SWI-Prolog Editor
You must re-consult the file after adding any rule. Otherwise prolog will not get the rule definition and show
ERROR: Undefined procedure. You can also do it by using the menu optionReload modified files.