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Error in KV decoder, or no KV decoder present

YV5WZ Extra as YV PY HC and General as KOMember ✭✭
edited December 2019 in Third-Party Software
I installed WSJT-X new 1.5 ....Now I get a message every single minute "Error in KV decoder, or no KV decoder present"  ..I have uninstalled and reinstalled  3 times......same error message



  • George KF2T
    George KF2T Member ✭✭✭
    edited December 2019
    You may want to check the WSJT Yahoo group for support; this is not likely a Flex issue. The KVASD install does require a license agreement, and for Mac OS, some terminal commands. You may need Administrative permissions in Windows and/or installing the software outside the "usual" Program Files folder.
  • Lee - N2LEE
    Lee - N2LEE Member ✭✭
    edited December 2016
    I agree. WSJT 1.5 works for me on SSDR so I would start looking at WSJT and Windows.
  • Richard Simpson
    edited September 2015
    I had the same problem installing WSJT-X on my Flex 1500. After trying everything suggested on the internet, I found the solution. Create an empty file named KVAST.BAT and place it in the in directory where you installed the WSJT-X executable. 


  • YV5WZ
    YV5WZ Extra as YV PY HC and General as KO Member ✭✭
    edited December 2016
    Wonderful Solution.....!!!! I did......and  ....It really works!!


  • DH2ID
    DH2ID Dr.med. Member ✭✭
    edited December 2016
    Your solution only tells WSJT-X that there is an executable whereas in my wsjtxin folder lives kvasd.exe. It was downloaded during installation
    of WSJT-X 1.5.

    In Jim Taylor's words it is

    ...an implementation of the the Koetter-Vardy algebraic soft-decision decoder for the Reed Solomon (63,12) code....

    A word about the Reed–Solomon error correction here:

    I have it and run it. To see whether it improves decoding I really should
    do a double-blind test with and without it :-)

    73, Alex DH2ID
  • George KF2T
    George KF2T Member ✭✭✭
    edited February 2019
    Quick update - the server hosting the KV Decoder went down, so the installation of a new version would fail. Once the download is available again (it is not included in the WSJTX distribution), installation should work normally.

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