>I have accidently created an object (in fact a form based on my own form class)using the correct class but from the wrong class library (actually from a backup of the class on another disk). Can I edit the form class so it uses the correct class library?

Make backups first! :)

The form is actually a table:

use myform.scx
browse

You will have to do some hunting; the fields in question are the 'Class' and 'Classloc'. After browsing, be sure to type 'USE ' in the command window.

HTH,