HTML5 Download maps on the fly including lighting scenario streaming levels

Development Platform & Builds
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1

While Im trying to use the “Download maps on the fly” feature to download and stream levels, everthing works fine but if I nominate one of the maps as a “Lighting Scenario map” then I’m getting this fatal error at runtime:

Project file not found: …/…/…/ProjectX/ProjectX.uprojectLowLevelFatalError [File\Build++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\Serialization\AsyncLoading.cpp] [Line: 2916]
MapBuildDataRegistry /Game/Level_Streaming/MapX_BuiltData.MapX_BuiltData: Serial LowLevelFatalError [File\Build+

It seems the package still tries to load a BuildData lightmap as per map which is not desirable when you have a lighting scenario map to store all lightmap data.

Is it a bug? is there any work around?

2

At least the “Project file not found: …/…/…/ProjectX/ProjectX.uproject” message currently occurs when running any project, that’s a red herring that can be safely ignored.

The other error messages sound like a bug of some kind, not sure what is the root cause here though. However I believe downloading maps on the fly is not supported for HTML5 builds in UE4 at the moment. I think all asset files are bundled in the initially downloaded .data file, though I have not tried out downloading on the fly in action.

3

Hi PersoDeath,

Please cut and paste the entire contents of the output log into a text document and post.

Thanks,

.

4

Hi PersoDeath,

Since we have not heard back from you in a while, we are marking this post “resolved” for tracking purposes. However, if you are continuing to get that fatal error at run time, please respond with the requested information and we will continue to investigate.

Thanks,

.