I've had HF VARA 4.7.2 installed for while for with VarAC_V6_4.15 no worries.
I've downloaded and installed "VarAC_V6_6.13" as I was eager to utilise the FLRig cat control and with all configured up it successfully controls the rig and reads the current rig state fine.
However the moment I performed a Beacon or Ping (first CQ) after the first TX the application crashes no error displayed and the rig is left in TX state which I cancels via FLRig UI.
I then proceeded to switch from FLRig to FT991A direct, and similar with FLRig the moment I perform a Beacon or Ping (first CQ) after the first TX the application crashes no error displayed and the rig is left in TX state which I then had to reset the rig.
I reinstalled, and went through the same flow flow (FLRig, then Direct) with Debug logging enabled and attached as zip.
My Setup Details:
Attempt Cat 1: Via FLRig (successfully working fine with WSJT-X, Log4OM, JS8Call, FLDigi etc etc)
Attempt Cat 2: Direct FT-991A via com3 using CAT for TX