For the benefit of the other readers, as I already mentioned in a private email to the OP, Myrtle Beach FD and PD now operate on the Horry County TRS. They no longer operate on the MB TRS. In fact, I'm not sure what if anything is carried on the MB TRS at this point. Someone please correct me if that's no longer accurate.
So, looking at the p500 file that was posted, it looks like there aren't any talkgroups associated with the MB FD Scan list 2, and only 1 Talkgroup associated with MB PD Scan List 3. So if you're scanning those banks, you'll hear nothing or very little. Looks like most of the MB TRS groups are associated with scan list 19, but you'll probably hear little on those either. You'll want to add the MB FD and PD talkgroups to the Horry County TSYS and associate those with SL 2 and 3 respectively.
Some other comments about the file:
- the MB system is programmed twice and the Horry County system 3 times, which is redundant, but shouldn't prevent anything from working correctly.
- You have some MB talkgroups associated with Scan List 7 which also has Charleston City data associated with it.
- The Charleston County analog system no longer carries much traffic on it, all of that traffic has moved to the P25 1D9 system, so that system can be removed and the 1D9 system programmed instead.
- There is no Palmetto 800 data listed, so you're missing all the state radio traffic.