'Swarm Failed to Kick off' error in 4.19

Development Architectural and Design Visualization
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1

My project suddenly started giving the ‘Swarm Failed to Kick off’ error that seems fairly common but not very specific.

The project is in 4.19, and worked fine up until today. I haven’t really changed anything (added a few lights which I deleted).

I have tried building other levels/projects and get the same error if they are in 4.19 but not in 4.18 (so it doesn’t seem to be anything project specific).

I first tried clearing caches and then removed and reinstalled UE 4.19 but nothing seems to work. It’s frustrating because it’s an archviz project that requires regular updates with the client and saying ‘the software I’m using is giving me a mysterious seemingly unsolvable error’ doesn’t look to great and delays the whole process.

Any ideas?

2

Solved!

I had SwarmAgent.exe set to run as admin because it seemed to need changing to fix a problem I was having when building over multiple computers. Turning admin off has fixed the issue but I have no idea why, and I have no idea why this suddenly cropped up after working fine previously with admin on.

I guess better to stick with building on one computer - for any time saved on the build I’ve spent double pulling out hair.

3

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: Download Visual C++ Redistributable Packages for Visual Studio 2013 from Official Microsoft Download Center
VS2015: Download Visual C++ Redistributable for Visual Studio 2015 from Official Microsoft Download Center

4

Thank you, thank you, thank you!!!

5

I had the same Problem in 4.21 . Solution: I deleted assets from Level and tryed rebuilding again until it builds lighting. Then I reload level withought saving and rebuild. Error gone:) hope it helps:)