public void pairwiseAlignmentMenuItem_actionPerformed(ActionEvent e)
{
- if(viewport.getSelectionGroup().getSize()<2)
+ if((viewport.getSelectionGroup()==null) ||
+ viewport.getSelectionGroup().getSize()<2)
JOptionPane.showInternalMessageDialog(this, "You must select at least 2 sequences.", "Invalid Selection", JOptionPane.WARNING_MESSAGE);
else
{