Just to inform you, I found a bug regarding COM port for PTT, it appears in WSJT-X 2.3 and in 2.4 RC1, let me explain.
I run 4 WSJT-X at the same time, I use Omnirig to control my IC9700 but PTT is manage via a COM port, this is a must for me to TX first a Sequencer via the COM port and later TX the radio, I cannot use CAT for PTT, that guarantee me no RF spikes etc. 4 WSJT-X plus MAP65 plus WSJT10 are all configure to use COM3 for PTT, in this configuration I can TX with ANY of the 6 programs, more precise I can TX with the program were the decodes or best decode happens, unfortunate since WSJT-X 2.3 and 2.4RC1 I can TX ONLY with the FIRST program who opens the PTT COM port, the other ones don't work and MAP65 give a opening COM port ERROR, the other WSJT-X simple don't TX, would be great to fix this bug because when you run multiple WSJT-X is a must to work with all instance capable of TX, WSJT-X 2.2.2 works perfect. To confirm this bug I roll back to 2.2.2 and install 2.3 and later 2.4RC1, the bug appear in 2.3 73 de Alex, HB9DRI
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