In the top of the screen in the VarAC log section there is a number of these "errors": In Dutch : 16:06:53 - De indeling van de invoertekenreeks is onjuist. bij System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) bij System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) bij System.Convert.ToInt32(String value) bij VarAC.VarAC.Load_configuration() I think the error is for C# : The format of the input string is incorrect I'm using windows 11, omni-rig 1.9, Yaesu FT-991A, and VarAC V3.2.1. VARA HF v4.5.7 In my opinion everything is working correctly... i did made a first QSO today! Kind regards, 73's PC2W (Koen)