Create plan views has STOPED working!

For the last couple of weeks I am unable to create any floor plans from the model using `create plan views` or from any other method.    The Create Plan Views icon, gives you three options and all of them produce the same.  Either a blank black CAD screen or a grayish empty drawing screen set to an isometric view.  I am not doing anything different than I have in the last 5 years but despite a reinstall it hit and miss but definitely getting worse.  Any ideas?