subanalysis menu option wont crash mussa

diff --git a/gui/ConnWindow.cxx b/gui/ConnWindow.cxx
index 75a5ad59b12c5c8553e62a216038a242504b4ef4..f4638b423a6198f27951b1033b0d6020422187aa 100644 (file)
--- a/gui/ConnWindow.cxx
+++ b/gui/ConnWindow.cxx
@@ -154,6 +154,11 @@ ConnWindow::real_subana_cb()
 {
   string subana_name;
 
+  if (an_analysis == 0 || an_analysis->the_seqs.size() == 0) {
+    fl_message("please load an analysis before creating a subanalysis");
+    return;
+  }
+    
   sub_analysis = new Mussa();
   subana_win = new SubAnalysisWindow(500,400,"Sub Analysis Setup", sub_analysis,
                                an_analysis->the_seqs);