D3DXFERR_BADTYPE: Bad type (-2005531770)

[yangguangpiaopiao]

meshData = fileSaveObject.AddDataObject(XFileGuid.Mesh, singleMesh.Name, Guid.Empty, meshStream.GetBuffer());
XFileSaveData：：AddDataObject(Guid dataTemplate, string name, Guid id, byte[] data);

XFileSaveData^ XFileSaveObject::AddDataObject_Internal( Guid dataTemplate, String^ name, Guid id, const void* data, SIZE_T size )
{
ID3DXFileSaveData *result;
GUID nativeId = Utilities::ConvertManagedGuid( id );
GUID *pointer = &nativeId;
if( id == Guid::Empty )
pointer = NULL;

	array<unsigned char>^ nameBytes = System::Text::ASCIIEncoding::ASCII->GetBytes( name );
	pin_ptr<unsigned char> pinnedName = &nameBytes[0];

	HRESULT hr = InternalPointer->AddDataObject( Utilities::ConvertManagedGuid( dataTemplate ),
		reinterpret_cast<LPCSTR>( pinnedName ), pointer, size, data, &result );
	
	if( RECORD_D3D9(hr).IsFailure )
		return nullptr;

	return XFileSaveData::FromPointer( result );
}

hr = -2005531770，Then the next step is unusual.