// Resolve expressions in the userConfigFilename and altConfigFilename
try
{
ExpressionEvaluator expressionEvaluator = new DefaultExpressionEvaluator();
expressionEvaluator.addExpressionSource( new SystemPropertyExpressionSource() );
userConfigFilename = expressionEvaluator.expand( userConfigFilename );
altConfigFilename = expressionEvaluator.expand( altConfigFilename );
}
catch ( EvaluatorException e )
{
throw new InitializationException( "Unable to evaluate expressions found in "