Sorry - it's been busy. First - I'm using "proper" reverse-DNS names and Team ID, I just have a habit of scrubbing identifying information when requesting support. (Yes, I see the mistake I made here). You were right in that it was a timing problem - though the specifics were a bit different. In my "automatic" path, I was querying for the status of the installed dext immediately after sending the request to install the dext. Well, it seems the system cannot work like that. You must wait to receive an answer before posting the next request. That's thankfully resolved now, and I'm back to moving ahead. Thanks for the replies!