Hello Irad, I have uploaded the debug file, let me know if it is showing something useful. 73's Adam

Hello Irad, unfortunately the new set of CAT commands to IC-821H does not work. I only have PTT (RTS) working, (that sometimes can't access the USB port but it's OK). More issues I notice are the following: 1. After selecting the varAC icon, the HF modem will always start, no matter if the SAT modem is set to active through Profile menu. This leads to a warning that 2 modems are active from the same folder. OK, I turn off HF modem manually. 2. To test CAT commands to IC-821H through Settings I need a valid VHF frequency to be selected which is not included in the list, I see only HF frequencies. I can only temporarily write something like 144.174000 in that field that I am not certain if it is accepted. In the main program's freq list I did save a VHF frequency. The IC-821H on this installation is making FT-8 on the QO-100 without problems ruling out hardware and PC issues.

Hello Irad, thanks for your reply. My IC-821H was already connected to this PC and is performing FT-8 on QO-100 so PTT is indeed controlled by RTS/DTR. To check CAT I must first finish the multiple profiles setup, so I will be back with results. My IC-728 HF is working fine in VARA_HF after adding it's extra CAT commands in the main .ini file. I downloaded these from the forum, as were not included in the latest CAT file that is updated through the program. 73's, Adam SV1CDU.