anchor.diff:  override_vacm(Config, VacmConf) ->
       Dir = filename:join(?config(priv_dir, Config),"conf"),
       File = filename:join(Dir,"vacm.conf"),
  -    file:delete(File),
  -    snmp_config:write_agent_vacm_config(Dir, "", VacmConf).
  +    ok = delete_file(File),
  +    ok = snmp_config:write_agent_vacm_config(Dir, "", VacmConf).
   
   %%%---------------------------------------------------------------------------
   
  
positive.code: 		Config, SysName, AgentManagerIP, IP),
      setup_manager(StartManager, MgrAgentConfName, SnmpAppConfName, 
  		  Config, AgentManagerIP),
      application:start(snmp),
  
      manager_register(StartManager, MgrAgentConfName).
   
  %%% @spec stop(Config) -> ok
  %%%      Config = [{Key, Value}]
  
negative.code:     FullPathFiles = lists:map(fun(File) -> filename:join(Dir, File) end,
  			      Files),
      lists:foreach(fun file:delete/1, FullPathFiles), 
      ok = delete_dir(Dir),
      ok.
  %%%---------------------------------------------------------------------------
  agent_conf(Agent, MgrAgentConfName) ->
  