FT8 randomly stops transmitting

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  • Updated 2 days ago
  • (Edited)
I've been running FT8 on my 6300 for 6 months and it was working well until recently when I added a second monitor to my computer and moved a few things around on the desk. I did not change any other connections on the computer or radio. I also recently upgraded to the latest version (v1.9.1 r8747). Now I find that FT8 randomly stops when WSJT commands the radio transmit. For instance I can call CQ on FT8 and it works fine for a random number of RX/TX cycles then won't transmit when it should. FT8 is not timing out... it has happened after just a couple of RX/TX CQ cycles, or it can happen after 8 cycles, or it may not stop at all. When it happens I don't hear the relay in the radio switchover to TX while WSJT thinks the radio IS transmitting. I looked at the CAT settings and nothing changed. To resolve it I have to shut down WSJT by going into the Windows 7 task manager to kill the instance of WSJT, then restart it and repeat the cycle. If I just shut down WSJT normally (hit X at the top right)  it still stays resident (Task still running) and if I try to restart it then I get the dialog message stating that another instance is running. I have to go into Task manager and end the process. The computer is a Lenovo Thinkcentre i5 running Windows 7 Professional.  Any thoughts or suggestions ?
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Hugh - VA3TO

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Posted 1 week ago

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Michael Walker, Employee

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Hi Hugh

I have seen this as well and it seemed to have happened when I switched to using network ports from RS232 ports.  

I am not sure if it is a CAT, TCP/IP or WSJTx problem.  It usually recovers on the next cycle.

My gut says it is with the latest version WSJTx.

Mike
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Hugh - VA3TO

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Hi Mike.
At least in your situation it recovers on a subsequent cycle. In my case, it doesn't. The only fix is to force WSJT to shut down thru the Task Manager. It has also happened mid QSO. It's as frustrating as hell. I'm going to post this to the WSJT FB list.

Hugh
(Edited)
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Lee Maisel

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I've had the same issue, and I don't know why either.. closing wsjt-x and re opening it hels for a while.

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Michael Walker, Employee

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Hugh, can you run a test on V1.8?  Not for making QSO's but just for testing.  You can even leave the RF power at Zero.

I think this showed up a 1.9.

Mike
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Hugh - VA3TO

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I can try it.  Will I have to uninstall 1.9 or can I have both installed ?  Seems to me 1.9 just overwrote the previous version when I updated it.

Edit:  I actually just looked and it appears that previous versions are not available on the WSJT-X web site. Do you happen to know if 1.8 is available elsewhere ?

(Edited)
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Al K0VM, Elmer

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High,
  When it stops, check to see how much CPU resources the WSJT-X task is using.. You will likely find it is several time more than normal which would indicate that WSJT has gone on an loop.  This seem to be a problem with WSJT-X use of Flex API interface.   If you us a cat port and select kenwood TS480 or ts2000 for the radio you will likely find reliable operation.
AL, K0VM
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Hugh - VA3TO

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Thanks for the suggestion Al. I'm going to try reloading the latest version over top of itself per another suggestion from someone who experienced the same problem and if that doesn't help then I'll try configuring it as a TS480 or TS2000.
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John - AI4FR

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Happens here as well especially when I am running two instances of wsjt-x and transmitting on different bands during the different time slots. On this end though it would skip a TX cycle at random but recover for the next cycle. Happens maybe once every few hours. PC here is fast, home built and water cooled, so no issues there i feel with a slow PC. I also had the same problem when running wsjt-x with an Icom 756 Pro 2 so I doubt it is a Flex issue. It's something in the software or PC. Happened on both versions 1.8 and 1.9. There was some past discussions on the wsjt-x reflector about this several months back but I don't think they found a solution.
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Clay N9IO

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Has happened to me a few times after extended periods of operating. Task manager the only way out.

Ver 1.9
(Edited)
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Hugh - VA3TO

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So I reloaded WSJT v1.9.1 r8747 overtop of itself and it greatly reduced the frequency of TX stalls. Then per K0VM Al's suggestion I changed the radio rig CAT setting from Flex to Kenwood TS-2000 and the problem seems to have gone away... touch wood.
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Doug K0DV

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I too have this problem, using a good version of Win 7 and the Flex 6700. In my case, if I reboot the computer and restart everything, including WSJX-X-JTAlertX, WSJT-X works well for an hour or so but then stops being able to activate the PTT. After it stops, when I try to unload WSJT-X-Alert, it gives me a cryptic error and asks me to try again, program then freezes.  Using Task Manager will not work and the computer will have to be rebooted. If I have a good session and PTT works okay, the next time I start the program I have no PTT until I reboot again.  I have taken to rebooting each time before I use WSJT-X and this helps to get my PTT back, but it is a pain in the butt. I will try to set up WSJT-X for Kenwood to see if that work-around works for me.  I believe this is a problem with the latest release of WSJT-X.
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Hugh - VA3TO

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Doug. Yes, try switching the CAT radio control in Settings from Flex to Kenwood TS-2000. Seems to have worked for me. I haven't had a TX lockup since i switched.
(Edited)
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Doug K0DV

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Will do, I'll post my results.
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Doug K0DV

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Hugh, unfortunately, when I use the Kenwood TS-2000 radio setting, I get the "Rig Control error" and it asks me if I want to reconfigure.  I tried the TS-480 setting and the same error occurs. I am using FLEXVSP and have established a Flex CAT port for the PTT.  Apparently, on my set-up, WSJX-X doesn't like to connect without the Flex Radio being designated.
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Al K0VM, Elmer

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Doug,
  You will need a FlexVSP ( ssdrCAT) port configured for CAT and then use' PTT via CAT' in WSJT-X.

AL, K0VM
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Hugh - VA3TO

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That's unfortunate. Maybe the 6700 has a different command set than the 6300.
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Al K0VM, Elmer

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Hugh,
  ALL, Flex 6000 series radios use the same CAT/ API command set

AL, K0VM
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John - AI4FR

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I have the 6700 and have it configured like VA3TO suggests. I gave up a long time ago on using the Flex setting in wsjt-x as I would loose CAT control after a short period. I still loose CAT at times now but much less frequently, maybe once or twice a day.
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Hugh - VA3TO

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It sounds like this has been a long standing issue. You'd think they would have sorted it out by now.
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Clay N9IO

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Joe Taylor had announced a week or so back that ver 2.0 with enhancements and fixes is forthcoming around the first of the year.
Stay tuned.
(Edited)
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Michael Walker, Employee

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Mine randomly does not go out of TX, but I think this is a WSJTx issue.   In order to fix it, you need to figure out how to make it happen all the time.  It is pretty hard to fix if you can't capture how it got there in the first place.

Mike
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Stan, K4SBZ

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My problem with my 6600M using SSDR is that I can't get started sometimes. I play around with the DAX and CAT buttons until suddenly it magically starts txing. It never cuts out, once started.

Today, I spent all afternoon and it wouldn't start. I ran across this thread and tried the TS2000 solution and it works so far. Started twice.

Stan, K4SBZ