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Webvisu crashes after 8 hours. Visufctcheckforunused clients

  • arjenbin - 2018-10-15

    Hi everyone.

    We are having a problem with our raspberry pi 3
    Running the codesys webvisu. After a Day or so the
    Webvisu freezes or shutsdown completely.

    The log says:

    Visufctcheckforunusedclients: removing cliΓ«nt at address

    Runtime is licensed..

    Kind Regards,

    Arjen Bin

  • eschwellinger

    eschwellinger - 2018-10-15

    which version is on the PI?
    Current version


  • arjenbin - 2018-10-16

    Hi Edwin,

    Thanks for your reply.

    it is

  • eschwellinger

    eschwellinger - 2018-10-16

    in case of the error could you login by CODESYS?
    Could you give me the
    cat /tmp/codesyscomtrol.log
    when error has occured?

  • arjenbin - 2018-10-16

    Hi Edwin,

    I will, but now I have to wait untill it happens again. I will pull the logfile using ssh..

    Regards Arjen

  • AlexD - 2019-04-01

    same problem webvisu randomly crashes

    codesyscontrol.txt [65.95 KiB]

  • eschwellinger

    eschwellinger - 2019-04-02

    could not see any crash in the logger.
    I would recommend to update to current version (if you want to stay on your old CODESYS development version, it is save to
    just update the runtime side)
    If you have the option update CODESYS Development System and Runtime.
    How to update only the runtime?
    Download the emPC-A/iMX6 SL package from the CODESYS store.
    Then put out the Debian package from this package ( rename it to zip) and copy this to
    "c:\Users\<yourwindowsusername>\CODESYS Control for emPC-A-iMX6 SL\Delivery\codesyscontrol_arm_emPC-A-iMX6_V3.5.14.x.deb"
    -> deploy it then with the update tool.</yourwindowsusername>

    Why this update?
    There are know bugs that the webserver is not reachable because of the communicaiton channels are busy. (not released when you connected by serveral Clients) This have been fixed with 3.5Sp12 Version.
    So if this is your Problem it should be solved by an update of the runtime.


  • januar - 2019-08-28

    Hi Erwin,

    We also experince this crash randomly. We use version Is that a way only to reset the webvisu and not restart all the CoDeSys?

    Thank you in advance.

    Kind regards,


  • eschwellinger

    eschwellinger - 2019-08-28

    No not possible... would update to current version.
    If thi still exist we need the plc log.

  • januar - 2019-11-14

    Hi Edwin,

    We update to 3.5SP15 but this problem is still exist. Please help us to solve this problem. Thank you.

    Note: We think that this is the result of closing a webvisu from another computer. Not directly on the pi. But we are not sure.



    IMG: PLC Log.PNG

    IMG: CallStack.PNG

  • eschwellinger

    eschwellinger - 2019-11-16

    need the project/projectarchive
    I would update to 3.5Sp15Patch2 as soon it is available.
    Check the project if all visu relatet stuff is called in the visutask context.


  • januar - 2019-12-20

    Hi Edwin,

    We do an update to 3.5SP15 patch2, but it become worst. It is more often crashed and there are now no exception in the log file. Also everything is now stop, not only the webvisu.

    Please advise us what to try or how to solve this. We are running installation on a production factory.

    Thank you in advance.

  • caprez95 - 2023-05-16

    I have the same problem.
    Did you find a solution?

    Kind regards


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