I am randomly having the program crash during Tx with the following error message displayed... Hamlib error: IO error port_open: serial_open status=-6 iofunc.c(80): port_open return(-6) rig.c(773):rig_open return(-6) while opening connection to rig Timestamp: 2021-11-20T05:36:27.157Z Running an IC7300 firmware is ver 1.40 connected to a Dell Inspiron with Win 10 and connected via USB. WSJT-X is ver 2.4.0 Some days it runs with no problems and other times it crashes over and over. Always during TX and seems to do it mostly when I first fire everything up, although it has happened occasionally after I have been operating for a long time. This started out of the blue, when I first put this station together this summer it worked flawlessly. Any ideas?