[CrashReport] UE4Editor_Engine!UMaterialInstance::SetParentInternal() [materialinstance.cpp:2141]

 2126       					CurrentResource->AddReferencedObjects(Collector);
 2127       				}
 2128       			}
 2129       		}
 2130       	}
 2131       
 2132       	Super::AddReferencedObjects(This, Collector);
 2133       }
 2134       
 2135       void UMaterialInstance::SetParentInternal(UMaterialInterface* NewParent, bool RecacheShaders)
 2136       {
 2137       	if (!Parent || Parent != NewParent)
 2138       	{
 2139       		// Check if the new parent is already an existing child
 2140 ***** 		UMaterialInstance* ParentAsMaterialInstance = Cast<UMaterialInstance>(NewParent);
 2141       		bool bSetParent = false;
 2142       
 2143       		if (ParentAsMaterialInstance != nullptr && ParentAsMaterialInstance->IsChildOf(this))
 2144       		{
 2145       			UE_LOG(LogMaterial, Warning, TEXT("%s is not a valid parent for %s as it is already a child of this material instance."),
 2146       				   *NewParent->GetFullName(),
 2147       				   *GetFullName());
 2148       		}
 2149       		else if (NewParent &&
 2150       				 !NewParent->IsA(UMaterial::StaticClass()) &&
 2151       				 !NewParent->IsA(UMaterialInstanceConstant::StaticClass()))
 2152       		{
 2153       			UE_LOG(LogMaterial, Warning, TEXT("%s is not a valid parent for %s. Only Materials and MaterialInstanceConstants are valid parents for a material instance."),
 2154       				*NewParent->GetFullName(),
 2155       				*GetFullName());

UE4Editor_Engine!UMaterialInstance::SetParentInternal() [materialinstance.cpp:2141]
UE4Editor_Landscape!ULandscapeComponent::UpdateMaterialInstances() [landscapeedit.cpp:299]
UE4Editor_Landscape!ULandscapeComponent::PostLoad() [landscape.cpp:574]
UE4Editor_CoreUObject!UObject::ConditionalPostLoad() [obj.cpp:810]
UE4Editor_CoreUObject!EndLoad() [uobjectglobals.cpp:1553]
UE4Editor_CoreUObject!LoadPackageInternalInner() [uobjectglobals.cpp:1228]
UE4Editor_CoreUObject!LoadPackage() [uobjectglobals.cpp:1400]
UE4Editor_UnrealEd!UEditorEngine::Map_Load() [editorserver.cpp:2399]
UE4Editor_UnrealEd!UEditorEngine::HandleMapCommand() [editorserver.cpp:5998]
UE4Editor_UnrealEd!UEditorEngine::Exec() [editorserver.cpp:5479]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() [unrealedsrv.cpp:624]
UE4Editor_UnrealEd!FEditorFileUtils::LoadMap() [filehelpers.cpp:2178]
UE4Editor_UnrealEd!FEditorFileUtils::LoadDefaultMapAtStartup() [filehelpers.cpp:3408]
UE4Editor_UnrealEd!FUnrealEdMisc::OnInit() [unrealedmisc.cpp:302]
UE4Editor_UnrealEd!EditorInit() [unrealed.cpp:89]
UE4Editor!GuardedMain() [launch.cpp:140]
UE4Editor!GuardedMainWrapper() [launchwindows.cpp:126]
UE4Editor!WinMain() [launchwindows.cpp:202]
UE4Editor!__scrt_common_main_seh() [exe_common.inl:264]
kernel32!BaseThreadInitThunk()
ntdll!RtlUserThreadStart()