On 20/12/2014 14:58, Paul DU2/WA8UGN wrote:
> Paul DU2/WA8UGN <keatipa@...> writes:
Hi Paul,

A few clarifications below:
>
>> I have started to receive errors today with WSJT-X v1.4.0-rc3 r4633.
>>
>> SETUP:
>> Kenwood TS-570D - VOX PTT; no CAT, DTR or RTS
>> SignaLink USB sound card
>> Sony VAIO (VPCCB) laptop w/ Windows 7 (64b) Home Premium
>> WSTJ-X v1.4-rc3 r4633
>>    Operating Freq:  24.917000 MHz
>>    Operating Mode:  JT9+JT65 (currently set for JT65 #)
>>    Decode:  Deepest
>> JTAlertX v2.5.5
>>    Applications Auto-Start: C:\WSTJ\wstjx\bin\wstjx.exe  (Start & Close)
>>    Logging:  DXLab DXKeeper v12.6.3 [PF]
>>    Library:  DXLab Pathfinder v5.0.1
>>
>> ERRORS:
>> 1) A pop-up error window exclaims: "The process cannot access the file
>> because it is being used by another process."
>>
>> 2) Simultaneously,the following is displayed in the Band Activity window:
>> "Error in KV decoder, or no KV decoder present."
>>
>> I have restarted the software a few times, as well as the laptop, but
>> errors still occur randomly.  Closing the pop-up window allows operator
>> intervention with the software - the software continues to download and
>> decode signals after errors are reported.
>>
>> Will continue observations, including those with various software
> disabled.
> FOLLOW-UP:
> I thought I had traced the problem to the "kvasd.exe" program that was
> installed at:
>
>     C:\WSJT\wsjtx\bin\kvasd.exe
>
> Trying to open it as admin, I received an error saying that the program was
> not registered.  Hmmm.  That's funny.  I then took steps to register it,
> and received a new error saying that the application was corrupt.
"Registration" is for .NET assemblies and programs using other Microsoft 
proprietary technologies. KVASD is a simple command line program written 
in C and Fortran and using the C and Fortran Standard Libraries, as such 
no registration is required. KVASD requires no elevated privileges to do 
its job and nothing related to WSJT-X needs administrator rights apart 
from from a small part of the installation which writes un-install 
details to the System registry. The installer handles the raising to 
administrator level itself and should not be run with Administrator rights.
>
> That was all I needed to see.  I backed up my important WSJT-X files, then
> re-installed WSJT-X v1.4.0-rc3 r4633 from scratch on top of the old install
> (didn't bother to uninstall).
Installing or un-installing WSJT-X v1.4 does not touch any files that 
are created during normal operation, there is no need to back up your 
log files etc. when installing or un-installing WSJT-X. Note that I am 
not saying backup of log files etc. is unnecessary, that is a very good 
idea if you don't want to loose important information due to system 
software or hardware or operator failures, but no specific backup and 
restore steps are necessary related to installation or un-installation 
of WSJT-X.

I would always recommend backing up important data before installing 
upgrades and at regular intervals.
>
> All ran exceptionally well for over 24 hours.  Then, while on 24.917,
> things happened again.  This time I observed that the error message in the
> Band Activity window occurred while WSJT-X was attempting to decode and
> extremely strong JT65 signal (-01 is the limit, but the Wide Graph display
> showed that if there was no limit, the signal would have been + double
> digits).
>
> The error message also changed a little.  It now read:
>       
>     "Error in KV decoder, or no KV decoder present. -107"
We are seeing intermittent instances of this failure but only for some 
users, it may be related to anti-virus software or specific CPU hardware 
but we have not isolated a definite cause yet.
>
> Additionally, decoding came to a halt about 4 minute-cycles later, with
> the "Decode" button constantly illuminated. No combination of "points &
> clicks" would bring WSJT-X out of its coma, save shutting it down and
> restarting it.  Once restarted, decoding returned to normal, except when
> the huge -01 signal was present. Then a single decode would have two error
> messages generated, the decoded message, then four more error messages
> displayed.
This behaviour usually is caused by the program 'jt9.exe', which is part 
of WSJT-X, not being controlled correctly by WSJT-X. WSJT-X does try and 
close it down on restart which is why a restart of WSJT-X is resolving 
the issue.

This is the first report I have seen of a particularly strong signal 
causing program errors. I doubt there is anything specific to the 
strength of a single signal that would cause such an error. I suppose it 
might be possible that a very strong signal would have many in band 
images above the decoding threshold and that multiple identical signals 
might be triggering an issue. Again multiple images of the same signal 
normally decode correctly so this too seems unlikely to be the source of 
the issue.
>
> These error messages did not have the "-107" but now the pop-up window
> exclaiming: "The process cannot access the file because it is being used by
> another process." returned.
>
> Will try complete reinstall after complete uninstall.
I doubt very much that this will make any difference at all.
>
> Onward and upward,  73
>
> Paul DU2/WA8UGN
>
73
Bill
G4WJS.
>
>
>
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