UE 4.2 Editor freezes when I press build

Every time I press in the editor to build, the editor freezes indefinitely. There is a simple imported FBX file.
Even with a clear scene it still freezes.

The message box says: build status, starting up swarm connection…(100%)
Build Progress bar is completely orange, and freeze.

This is a fresh 4.2 installation, that have no problem to run the downloaded preview content

Please advise, out team just started to evaluate UNREAL engine for a new project.

Hey, I have the same issue/bug, posted a question last night & waiting for a response.


It seems that we have a slightly different problem,
My SwarmAgent is running:
11:34:11 PM: Starting up SwarmAgent …
11:34:11 PM: … registering SwarmAgent with remoting service
11:34:11 PM: … registering SwarmAgent network channels
11:34:11 PM: … initializing SwarmAgent
11:34:11 PM: … certificate check has failed
11:34:11 PM: … initializing cache
11:34:11 PM: … using cache folder ‘C:/UNREAL_CATCH’
11:34:11 PM: … recreating SwarmAgent cache staging area
11:34:11 PM: … initializing connection to SwarmCoordinator
11:34:11 PM: … using SwarmCoordinator on RENDER-01
11:34:14 PM: … SwarmCoordinator failed to be initialized
11:34:14 PM: … initializing local performance monitoring subsystem
11:34:15 PM: … initialization successful, SwarmAgent now running

But the build process still freezes the editor

It is possible one of the options I tried could work for you.

Try to disable any anti-virus & firewalls (including windows default).
Try deleting the Swarm Agent cache data (it can be found in the swarm agent settings) then restarting the build process.
Try running as administrator.

Thanks you, that seemed to sort it out.
My anti virus agent was blocking the process.

Thats great news, glad to have helped.