In the recent 7.1.4 release there is a bug where VarAC fails to properly communicate with OmniRig when performing QSYs (Manuals or Autos).
Here is a download link of the VarAC.exe that fixes this bug.
If you are using OmniRig - you are 100% affected by this bug and I urge you to upgrade.
I suggest to release a 7.1.5 version noting this critical fix. Some people download straight the app and may not read the forum.