When importing landscapes from World Machine (R16 file) I sometimes get an error that makes my sub-level maps unopenable with the editor crashing with “Assertion failed: MaxSubjectZ > MinSubjectZ”
This is happening on otherwise blank maps, however it is inconsistent in that it doesn’t happen to all the maps.
Assertion failed: MaxSubjectZ > MinSubjectZ [File:D:\Build\++UE4+Release-4.17+Compile\Sync\Engine\Source\Runtime\Renderer\Private\ShadowSetup.cpp] [Line: 728] MaxSubjectZ -nan(ind) MinSubjectZ -1048576.000000 SubjectBounds.SphereRadius 0.000000
UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.17+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
If you want I can post the rest of the stack trace. Have already sent the error reports to Epic.
My only solution so far has been to delete the UE4 map asset & reimport the R16 landscape file.
I have not experienced similar behavior in 4.16, though might’ve just gotten lucky.
Cheers,
Dave