message: Change error message to avoid validation failure
diff: @@ -244,7 +244,7 @@ Bool_t AliGenExtExec::StopGen()
  // kill generator if running
  if (fPID == 0) {
  - AliError("generator not running, nothing killed");
  + AliInfo("trying to stop generator, but no process running ...");
  return kFALSE;
  }
  