Hi folks I define a constant in a config file: define( 'VARIABLE_CLASS', 'myclass' ) ; Can any kind person explain why this fails with the error "Cannot instantiate non-existent class" >>>>>>>>>>>>>> new VARIABLE_CLASS ; >>>>>>>>>>>>>> While this works: >>>>>>>>>>>>>> $class = VARIABLE_CLASS ; new $class ; >>>>>>>>>>>>>> Must be something about constants which I don't understand... Thanks Geoff Caplan