null pointer exception bug fix

diff --git a/src/jalview/analysis/CrossRef.java b/src/jalview/analysis/CrossRef.java
index 9e99c7c..f475ecb 100644 (file)
--- a/src/jalview/analysis/CrossRef.java
+++ b/src/jalview/analysis/CrossRef.java
@@ -377,8 +377,13 @@ public class CrossRef
           AlignmentI dataset, Vector rseqs, AlignedCodonFrame cf, boolean direct, boolean dna)\r
   {\r
     boolean found = false;\r
-    if (dataset==null)\r
+    if (dataset==null) \r
       return false;\r
+    if (dataset.getSequences()==null)\r
+    {\r
+      System.err.println("Empty dataset sequence set - NO VECTOR");\r
+      return false;\r
+    }\r
     Enumeration e = dataset.getSequences().elements();\r
     while (e.hasMoreElements())\r
     {\r