I have just started using WSPR and trying to get CAT control of my FT897 or FT450 working I noticed band changes did not work and I got an open error message from rigctl.exe in the 'MSDos' window.
I have finally resolved it by changing the CAT Port setting from COMxx: to \\.\COMxx:
Could this information be put in the user guide please.
73 de Colin 2E0BPP