Search in
Sort by:

Question Status:

Search help

  • Simple searches use one or more words. Separate the words with spaces (cat dog) to search cat,dog or both. Separate the words with plus signs (cat +dog) to search for items that may contain cat but must contain dog.
  • You can further refine your search on the search results page, where you can search by keywords, author, topic. These can be combined with each other. Examples
    • cat dog --matches anything with cat,dog or both
    • cat +dog --searches for cat +dog where dog is a mandatory term
    • cat -dog -- searches for cat excluding any result containing dog
    • [cats] —will restrict your search to results with topic named "cats"
    • [cats] [dogs] —will restrict your search to results with both topics, "cats", and "dogs"

[UE4 - Promoted Build - 4.12.0] SwarmAgent failed to kick off ->Unrealightmass.exe missing

Hi community!

I'm using UE4 from promoted build, currently 4.12.0 and was never able to build any Scene (since promoted 4.11 maybe, I don't remember ;) due to the "SwarmAgent failed to kick off..." issue until spotting this line in the logs:

 [Interface:CacheAllFiles] Failed to cache the executable: C:\My\Path\To\GitHub\UnrealEngine\Engine\Binaries\Win64\UnrealLightmass.exe

Surprisingly, the executable was not present there so I've opened the VS Solution to build the UnrealLightmass Project to generate it. Now it runs fine...the lighting build is back so it would be nice to activate this project by default in the Engine Build Solution if this functionality is still required by the Editor right?

Note: VS 2013 and 2015 are both installed on my machine. In this situation, the current GenerateProjectFiles.bat still create VS 2013 solution if VS 2013 is installed so I just create a bat shortcut with the -2015 arg to generate VS 2015 solution. It would also be nice to remove VS 2013 logic from the Setup now ;)

Product Version: Not Selected
more ▼

asked Jan 18 '16 at 09:30 PM in Installation & Setup

avatar image

388 11 16 38

avatar image HughMacd Feb 05 '16 at 06:28 PM

I just wanted to add that I'm also experiencing this, using 4.12.0 that I compiled myself.

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

1 answer: sort voted first

Hi Tensa_Zangetsu -

Thank you for your report, I was able to reproduce this issue and reported it as UE-25666. I will keep you informed as we continue to investigate a solution

Eric Ketchum

more ▼

answered Jan 19 '16 at 04:12 PM

avatar image

Lovecraft_K ♦♦ STAFF
36.7k 702 260 735

avatar image muchcharles Apr 12 '16 at 08:29 AM

I'm getting the same issue with 4.11.1 from Github. Manually kicking off the build for unreallightmass.exe fixed it, even though the original build said everything succeeded.

(comments are locked)
10|2000 characters needed characters left
Viewable by all users
Your answer
toggle preview:

Up to 5 attachments (including images) can be used with a maximum of 5.2 MB each and 5.2 MB total.

Follow this question

Once you sign in you will be able to subscribe for any updates here

Answers to this question