      $if multithreaded defined
        call "CBL_MUTEX_RELEASE" using by value critSect

      $if debug defined   
        move critSectAsNum to dispNum of releasegroup                                               
        invoke self "trace" using ReleaseGroup
        if return-code not = zero
                stop "mutext release failed with"
                display return-code
        end-if
      $end
      $end
