>I am having a problem fooling around with the DataAdapter class. When I attemp to create a DE class VFP tells me 'There are no registered builder of this type'. The builder table clearly lists this type. I was able at one point to delete the entry in the builder table and reenter it. Subsequently the builder worked, but now it has gone south again. Any suggestions greatly appreciated!

Try to rename builder table and let VFP to re-create it. After that you can add any missing record from the renamed one.