checkForOutputFileWriteability( present_species );
if ( phy.getNumberOfExternalNodes() < 2 ) {
ForesterUtil.fatalError( PRG_NAME, "phylogeny has " + phy.getNumberOfExternalNodes()
checkForOutputFileWriteability( present_species );
if ( phy.getNumberOfExternalNodes() < 2 ) {
ForesterUtil.fatalError( PRG_NAME, "phylogeny has " + phy.getNumberOfExternalNodes()