Some FBX files have Null/LimbNode attributes with an empty Properties70 element, where the Element is not NULL, but it's Compound is. The code only checked if the Element itself is NULL, thus causing a DeadlyImportError when trying to instantiate a PropertyTable for an Element that doesn't have a Compound.

code/FBXDocumentUtil.cpp

@@ -115,7 +115,7 @@ std::shared_ptr<const PropertyTable> GetPropertyTable(const Document& doc,
         }
     }
 
-    if(!Properties70) {
+    if(!Properties70 || !Properties70->Compound()) {
         if(!no_warn) {
             DOMWarning("property table (Properties70) not found",&element);
         }