Currently, RunProgramEx will always log the exit code if it is non-zero. We'll add to our request list an option to take into account the success codes when determining whether to log the exit code. For now, you might disable logging of that step's output or set the log level to Errors only.
http://www.kinook.com/VisBuildPro/Ma...tepfailure.htm
http://www.kinook.com/VisBuildPro/Manual/loggingopt.htm