Merge branch 'develop' into spike/JAL-4047/JAL-4048_columns_in_sequenceID

[jalview.git] / src / jalview / datamodel / DBRefSource.java

diff --git a/src/jalview/datamodel/DBRefSource.java b/src/jalview/datamodel/DBRefSource.java
index f384b1e..3b1757b 100755 (executable)
--- a/src/jalview/datamodel/DBRefSource.java
+++ b/src/jalview/datamodel/DBRefSource.java
@@ -154,6 +154,11 @@ public class DBRefSource
 
   public static boolean isPrimaryCandidate(String ucversion)
   {
+    if (ucversion==null)
+    {
+      // Null/empty version is not a real reference ?
+      return false;
+    }
     // tricky - this test really needs to search the sequence's set of dbrefs to
     // see if there is a primary reference that derived this reference.
     for (int i = allSources.length; --i >= 0;)