So here is the scenario. Troubleshooting a 776 error in 2 rms in a hotel with a DRE basic system. This hotel is fed by DSWM30's. This is not a homerun system, but a riser system using SWM taps in the rooms on each riser. That's the basics. It is a 6 story hotel with 10 rooms on the riser I'm working on. These 10 rooms are fed off of 1 leg of the DSWM30. Everything is great on floors 2, 3, 4, and 5. I am getting the error on the 6th floor on the last 2 rooms of the riser. Connected my AIM in the problem rooms, and it shows 8 receivers connected, with 7 SWM channels available...like it should. These are H25 receivers, by the way. I know that I should be able to connect 13 on each leg, but I'm still getting the error. I reset the DSWM30, but no help. I unplugged each receiver on every floor, except for 1 room which I could not access on the 3rd floor due to a guest. Then, I checked the available SWM channels on the 6th floor in my problem rooms and it only showed the 1 receiver that was still connected, with 14 channels available. I next plugged in the receivers on the 6th floor, but the same 776 error persisted. Reconnected all of the others on that riser and they are fine, like before. I have tested the levels in the problem rooms and they are great. Did an all available satellite transponder test in the room and the signals look great. I tried a replacement receiver and it did the same exact thing. What the heck am I missing?