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Lighting build failed. Swarm failed to kick off.

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    [EDITOR] Lighting build failed. Swarm failed to kick off.

    Got this error today after working on a project with no errors for hundreds of hours, troubleshooted every solution available online to no avail. Tried deleting every item on the map, disabling firewall, checking if 2 instances were running at once but nothing. Are there any other solutions to this and is it really necessary that this connects online to build your map? I really don't get it and am currently contemplating reinstalling Windows :/ Any help would be greatly appreciated!

    #2
    Try to rebuild UnrealLightmass (open *.sln file in Visual Studio, in Solution Explorer right click on Programs->UnrealLightmass, build (or rebuild)). I had this error and rebuild was the only thing that helped me.

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      #3
      Thanks for the reply man, where exactly is the sln file? Ah programming, I only do level design and have no experience with that. Any advice on how to generate the file? I can use another PC for now.
      Last edited by AstralRider; 06-25-2016, 04:29 AM.

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        #4
        You don't need any programming skills to build the ue4.
        Go to https://github.com/EpicGames/UnrealEngine (you'll need github account (free), otherwise you'll get 404 error message) -> Clone or download -> download ZIP. Unzip to some folder.
        Install Microsoft Visual Studio (https://www.visualstudio.com/ -> Download Community 2015).
        In the folder with unzipped ue4 run Setup.bat file
        GenerateProjectFiles.bat
        Double-click on the UE4.sln file
        In Solution Explorer right click on the UE4 target and select Build (it'll build entire engine, including UnrealLightmass). Wait ~40min. After that you'll get working copy of the latest ue4 version. Run ..\Engine\Binaries\Win64\UE4Editor.exe, choose your project, and everything should work fine.

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          #5
          Thanks mate, you're a legend!

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            #6
            Thanks! That solved my problem!

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              #7
              THIS WORKED FOR ME:

              If you're using 4.10 or later you will need to have the VS2015 dependencies installed.
              You can download the Visual Studio Dependencies from Microsoft's website:

              VS2013: http://www.microsoft.com/en-us/downl....aspx?id=40784
              VS2015: https://www.microsoft.com/en-us/down....aspx?id=48145

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                #8
                Originally posted by Yura_s View Post
                You don't need any programming skills to build the ue4.
                Go to https://github.com/EpicGames/UnrealEngine (you'll need github account (free), otherwise you'll get 404 error message) -> Clone or download -> download ZIP. Unzip to some folder.
                Install Microsoft Visual Studio (https://www.visualstudio.com/ -> Download Community 2015).
                In the folder with unzipped ue4 run Setup.bat file
                GenerateProjectFiles.bat
                Double-click on the UE4.sln file
                In Solution Explorer right click on the UE4 target and select Build (it'll build entire engine, including UnrealLightmass). Wait ~40min. After that you'll get working copy of the latest ue4 version. Run ..\Engine\Binaries\Win64\UE4Editor.exe, choose your project, and everything should work fine.
                That link is broken. What are we suppose to be downloading? Also yes I'm resurrecting this thread because my lighting keeps failing and I have no idea why.

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                  #9
                  Originally posted by waynechriss View Post

                  That link is broken. What are we suppose to be downloading? Also yes I'm resurrecting this thread because my lighting keeps failing and I have no idea why.
                  Which link is broken? If you're referring to the GitHub link, you'll need to connect your Epic account to GitHub to view the content: https://www.unrealengine.com/en-US/ue4-on-github

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