X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FJvOptionPane.java;fp=src%2Fjalview%2Fgui%2FJvOptionPane.java;h=e62244579bf496cd940e0af5efbcc63d278d7dc2;hb=49c595b1a5d841a27e6c01367da99d278152b976;hp=c0efd4a5e61826ba057dbbfea4373994ae46e0fb;hpb=ff8a85b4462d824e858b9ce57082455772e1a2ff;p=jalview.git

diff --git a/src/jalview/gui/JvOptionPane.java b/src/jalview/gui/JvOptionPane.java
index c0efd4a..e622445 100644
--- a/src/jalview/gui/JvOptionPane.java
+++ b/src/jalview/gui/JvOptionPane.java
@@ -1129,7 +1129,13 @@ public class JvOptionPane extends JOptionPane
 
   private void internalDialogHandleResponse()
   {
-    String responseString = (String) this.getValue();
+    Object value = this.getValue();
+    if (value == null
+            || (value instanceof Integer && (Integer) value == -1))
+    {
+      return;
+    }
+    String responseString = value.toString();
     int response = ourOptions.indexOf(responseString);
 
     if (!Platform.isJS())