This might not be a widely-used feature, but I wanted to post it here first versus directly to Jim (to follow the rules). There is a feature within App_rpt where you can send MDC1200 status messages and have commands acted upon. I've used a MCS2000 mobile and Astro Saber successfully for a very fast and efficient control method. Recently I sold my Astro Saber and bought an XTS3000. I can still send MDC statuses and get them acted upon, but no longer get the "ACK" back from Allstar. No changes in software and the logs show the op=46 like before and the proper Unit ID and status sent...so I'm at a loss of why Allstar stops trying to ACK these statuses for this one type of radio (my mobile still works fine). Debug suggestions and code testing welcome. Thanks, Tony