USD static mesh exporter not working when accessing UStaticMeshExporterUsdOptions mutable default

Development Asset Creation
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1

Hi, it seems that just accessing the UStaticMeshExporterUSDOptions default object, anywhere in the code, prevents the USD static mesh exporter from working.

UStaticMeshExporterUSDOptions* Options = nullptr;
Options = GetMutableDefault<UStaticMeshExporterUSDOptions>();

I attach a minimal sample to demonstrate this wrong behavior.

Digging into this issue, I noticed that the line

const pxr::SdfFileFormatConstPtr Format = pxr::SdfFileFormat::FindById( FormatId );

in the UnrealUSDWrapper::GetNativeFileFormats() method, called at the UStaticMeshExporterUsd object creation, can’t return a valid Format object at all.

Can’t explain this strange issue, please help me!

Thanks,
Loris

USDImporterBug.zip (9.2 KB)