Can't build 4.7 from source, compile failed

Development Programming & Scripting
1

I try to build the latest 4.7 branch from source, but unfortunately the compiling fails. Before today it always worked.

I tried it now 3 times and it always failed with the same Error, I even disabled my antivirus program.

1>ERROR : UBT error : Failed to produce item: E:\Downloads\UnrealEngine-4.7\UnrealEngine-4.7\Engine\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-Landscape.lib
1>  Cumulative action seconds (6 processors): 0,00 building projects, 13394,72 compiling, 0,00 creating app bundles, 0,00 generating debug info, 110,54 linking, 0,00 other
1>  UBT execution time: 2425,79 seconds
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets(38,5): error MSB3073: The command "..\..\Build\BatchFiles\Build.bat UE4Editor Win64 Development" exited with code -1.
========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ==========
2

Does the file E:\Downloads\UnrealEngine-4.7\UnrealEngine-4.7\Engine\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-Landscape.lib exist on your local filesystem?

3

No, it does not. But I have one file called “UE4Editor-Landscape.lib.response”.

4

Is there anything else in the log?

5

Of course, the log is quiet long but the rest is not of importance I guess.

Download

This should be very easily be reproducible, just download the most recent 4.7 branch and try to build it, or could the error only happen to me?

6

Ahh yeah, this is the issue:

1>E:\Downloads\UnrealEngine-4.7\UnrealEngine-4.7\Engine\Source\Runtime\Landscape\Private\LandscapeCollision.cpp(349): error C2065: ‘MeshGuid’ : undeclared identifier

Looks like 4.7 is broken (red) - this will be fixed presently but if you want to move on just replace MeshGuid with HeightfieldGuid (effectively reverting the most recent change to that file).

7

Since this needs an answer to be marked as resolved, here is the answer. Issue was fixed in updated 4.7 branch.

8

Thanks, was fixed really really fast :slight_smile: So let’s see whether I can use my project now or I will have to write a new answerhub bug post in 10 minutes :stuck_out_tongue: