[CrashReport] UE4Editor_Engine!UModelComponent::CommitSurfaces() [modelcomponent.cpp:163]

 150       void UModelComponent::CommitSurfaces()
  151       {
  152       	TArray<int32> InvalidElements;
  153       
  154       	// Find nodes that are from surfaces which have been invalidated.
  155       	TMap<uint16,FModelElement*> InvalidNodes;
  156       	for(int32 ElementIndex = 0;ElementIndex < Elements.Num();ElementIndex++)
  157       	{
  158       		FModelElement& Element = Elements[ElementIndex];
  159       		TArray<uint16> NewNodes;
  160       		for(int32 NodeIndex = 0;NodeIndex < Element.Nodes.Num();NodeIndex++)
  161       		{
  162 ***** 			FBspNode& Node = Model->Nodes[Element.Nodes[NodeIndex]];
  163       			FBspSurf& Surf = Model->Surfs[Node.iSurf];
  164       			if(Surf.Material != Element.Material)
  165       			{
  166       				// This node's material changed, remove it from the element and put it on the invalid node list.
  167       				InvalidNodes.Add(Element.Nodes[NodeIndex],&Element);
  168       
  169       				// Mark the node's original element as being invalid.
  170       				InvalidElements.AddUnique(ElementIndex);
  171       			}
  172       			else
  173       			{
  174       				NewNodes.Add(Element.Nodes[NodeIndex]);
  175       			}
  176       		}