Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR or 4O3A Genius Product Software?
SmartSDR v3.9.19 and the SmartSDR v3.9.19 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
The latest 4O3A Genius Product Software and Firmware
SmartSDR v3.9.19 and the SmartSDR v3.9.19 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
The latest 4O3A Genius Product Software and Firmware
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
Error in KV decoder, or no KV decoder present
Options

YV5WZ
Member ✭✭
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
YV5WZ
George
YV5WZ
0
Answers
-
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.0
-
I agree. WSJT 1.5 works for me on SSDR so I would start looking at WSJT and Windows.0
-
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.
Rick
K3IND
1 -
Wonderful Solution.....!!!! I did......and ....It really works!!
Thanks!!
George
YV5WZ0 -
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:
https://en.wikipedia.org/wiki/Reed%E2%80%93Solomon_error_correction
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 DH2ID0 -
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.0
Leave a Comment
Categories
- All Categories
- 330 Community Topics
- 2.1K New Ideas
- 597 The Flea Market
- 7.9K Software
- 6.2K SmartSDR for Windows
- 168 SmartSDR for Maestro and M models
- 397 SmartSDR for Mac
- 260 SmartSDR for iOS
- 247 SmartSDR CAT
- 180 DAX
- 369 SmartSDR API
- 9.1K Radios and Accessories
- 15 Aurora
- 163 FLEX-8000 Signature Series
- 7.1K FLEX-6000 Signature Series
- 911 Maestro
- 51 FlexControl
- 854 FLEX Series (Legacy) Radios
- 873 Genius Products
- 446 Power Genius XL Amplifier
- 312 Tuner Genius XL
- 115 Antenna Genius
- 278 Shack Infrastructure
- 196 Networking
- 439 Remote Operation (SmartLink)
- 135 Contesting
- 726 Peripherals & Station Integration
- 137 Amateur Radio Interests
- 945 Third-Party Software