Revize baf6fc22

More changes in export and download

Backend/Core/ZipUtils/Export.cs

@@ -38 +38 @@
                 }
 
                 var finalAnnotation = documentFinalAnnotations[document];
+                if (finalAnnotation == null)
+                {
+                    continue;
+                }
+
                 var finalTags = finalAnnotationTags[finalAnnotation].Select(ft => ft as AnnotationTagGeneric).ToList();
                 string finalAnnotationInfoJson = DumpAnnotation(finalAnnotation, finalTags, document.Id);
                 CreateFile(documentDir + "/final.json", finalAnnotationInfoJson, archive);