RSLinx

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  • #1048
    Paul_85Paul_85
    Participant
      Karma: 19
      Rank: Padawan

      Hey Fellas. It’s good to join. Hopefully I’ll be able to learn a lot from the site. I have a question about RSLinx. When I open it, it gives an error that says “Failed to show RSWho, can’t access the harmony.rsh file”. The file is in the proper location under rscommon. I’ve tried uninstalling and reinstalling RSLinx with no luck. Any suggestions?

      #1049
      PLCGurutfgmedia_admin
      Keymaster

        Hi James and welcome to the Forum!

        The first thing you want to make sure is that RSLinx is compatible with the Operating System you are using. Refer to the Product Compatibility and Download Center to check compatibility.

        You can try deleting the harmony files so they are recreated upon launching, try this:
        Close all software including RSLinx Classic. If RSLinx is running as a service, switch to run as an application.
        Open Windows Explorer and go to
        For 32 bit Systems, C:\Program Files\Rockwell Software\RSCommon
        For 64 bit Systems, C:\Program Files (x86)\Rockwell Software\RSCommon
        Delete Harmony.hrc and Harmony.rsh (you may have Harmony instead of Harmony.rsh). Do not delete HRMYUI.DLL
        If you cannot delete the Harmony files, stop the Harmony service at Start–>Control Panel –>Administrative tools –> Services or reboot your computer
        If you have a Windows 64 bit system you may only have 1 harmony file.
        Change it back to run as a service, and restart the computer if necessary.

        If this doesn’t work let us know and provide more info on RSLinx version, OS version etc.

        #1064
        Paul_85Paul_85
        Participant
          Karma: 19
          Rank: Padawan

          I tried to delete the harmony file to no avail. I did some more research and found that a Windows update is what was the problem. I had to go to “Programs and Features” and then to “View Installed Updates”. Find the update with the number (KB4056829) and uninstall it, then restart the computer. Everything came right up just fine afterwards. Thank you PLC Guru for your support, and maybe this will be helpful to others if the problem occurs to them.

          #1065
          PLCGurutfgmedia_admin
          Keymaster

            Absolutely James! And we’re happy to have you on board here at PLCGurus.NET. Look out for the new video series we are working on that will allow you to develop your own SCADA/HMI applications using Visual Studio and C# via direct access to a ControlLogix or similar PLC…(without the need for RSLinx or other OPC Server software). It’s going to be awesome!

            #1077
            ckemmannckemmann
            Participant
              Karma: 12
              Rank: Padawan

              Also new here. Thank you James for posting this…I was completely stuck. I had the same problem as you did and reinstalling RSLinx, deleting harmony.rsh files, etc. didn’t solve it. Uninstalling that Windows update was what took care of it. I’ve sent in a feedback posting to Microsoft on the Feedback app…which probably amounts to blowing on an oil rig fire.

              #1078
              PLCGurutfgmedia_admin
              Keymaster

                LOL…I needed a good laugh today…thanks Christopher!

                #1094
                Paul_85Paul_85
                Participant
                  Karma: 19
                  Rank: Padawan

                  No problem Christopher Kemmann. Glad it helped.

                  #1259
                  bachphibachphi
                  Participant
                    Karma: 25
                    Rank: Padawan

                    uninstalling KB4056892 is sufficient for me. This is the patch for Spectre-Metldown

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