! Existence error in user:environ/2
! procedure user:environ/2
does not exist
! goal: user:environ(no_interrupts,true)
! Existence error in argument 1 of absolute_file_name/3
! file probsrc(pathes_lib) does not exist
! goal: absolute_file_name(probsrc(pathes_lib),_3557,[access(exist),file_type(source),relative_to('/builds/stups/prob/prolog_doc_gen/prolog-Doc/prob_prolog/extensions/user_signal/user_signal.pl')])