diff --git a/Src/LexText/Interlinear/ComplexConcParagraphData.cs b/Src/LexText/Interlinear/ComplexConcParagraphData.cs
index 66a02bca06..795edbf2fc 100644
--- a/Src/LexText/Interlinear/ComplexConcParagraphData.cs
+++ b/Src/LexText/Interlinear/ComplexConcParagraphData.cs
@@ -200,7 +200,8 @@ private bool GenerateShape(FeatureSystem featSys)
 			{
 				// skip invalid tags
 				// TODO: should these tags be cleaned up somewhere?
-				if (tag.BeginAnalysisIndex >= tag.BeginSegmentRA.AnalysesRS.Count || tag.EndAnalysisIndex >= tag.EndSegmentRA.AnalysesRS.Count
+				if (tag.BeginSegmentRA == null || tag.EndSegmentRA == null ||
+					tag.BeginAnalysisIndex >= tag.BeginSegmentRA.AnalysesRS.Count || tag.EndAnalysisIndex >= tag.EndSegmentRA.AnalysesRS.Count
 					|| tag.BeginAnalysisIndex > tag.EndAnalysisIndex)
 				{
 					continue;