anchor.diff:  
   join(Dir, File) ->
       filename:join(Dir, File).
  +
  +
  +skip(R) ->
  +    exit({skip, R}).
   
   %% await_pdu(To) ->
   %%     await_response(To, pdu).
  
positive.code:                 (SysEvs =:= []) ->
                      Error;
                  true ->
                      {skip, {system_events, SysEvs}}
              end;
  
  
  
negative.code: await_tc_runner_done(Runner, OldFlag) ->
      receive
          {'EXIT', Runner, Reason} ->
              %% This is not a normal (tc) failure (that is the clause below).
              %% Instead the tc runner process crashed, for some reason. So
              %% check if have got any system events, and if so, skip.
              SysEvs = snmp_test_global_sys_monitor:events(),
              if
                  (SysEvs =:= []) ->
                      ?EPRINT2("TC runner failed: "
                               "~n   ~p~n", [Reason]),
                      exit({tx_runner_failed, Reason});
                  true ->
                      ?EPRINT2("TC runner failed when we got system events: "
                               "~n   Reason:     ~p"
                               "~n   Sys Events: ~p"
                               "~n", [Reason, SysEvs]),
                      skip([{reason, Reason}, {system_events, SysEvs}])
              end;
  	{tc_runner_done, Runner, {'EXIT', Rn}, Loc} ->
  	    ?PRINT2("call -> done with exit: "
                      "~n   Rn:  ~p"
  