Status validation = data.getVariables().validation();

if( ! validation.ok() )
{
    if( validation.children().isEmpty() )
    {
        System.err.println( "Problem Count: 1" );
        System.err.println( validation.toString() );
    }
    else
    {
        System.err.println( "Problem Count: " + validation.children().size()  );

        for( Status child : validation.children() )
        {
            System.err.println( child.toString() );
        }
    }
}