diff --git a/RhSolutions.AddIn/Services/GuessReader.cs b/RhSolutions.AddIn/Services/GuessReader.cs
index 2f6c3c6..93609d0 100644
--- a/RhSolutions.AddIn/Services/GuessReader.cs
+++ b/RhSolutions.AddIn/Services/GuessReader.cs
@@ -161,6 +161,10 @@ public class GuessReader : IReader
 
             var productCells = productColumn.Value2;
             object currentProductCell = productColumn.Rows.Count == 1 ? productCells : productCells[row, 1];
+            if (currentProductCell == null)
+            {
+                continue;
+            }
 
             if (ProductSku.TryParse(currentProductCell.ToString(), out IEnumerable<ProductSku> skus))
             {