Calvin,

What are you launch the builder on? One of your own classes or a baseclass object?

>I spoke too quickly. The file location is set correctly. If I type 'do builder.app' the application run. However, it still gives me the message that there are no registered builder and goes on to say 'Please locate the class library which contains this definition'??? Builders work fine in my copy of VFP 5.0. Have you got any more insight?