Where does the SWD process get to before it fails? This article outlines the workflow:
The couple instances I found of that error basically pointed to a corrupted agent, but without more details it's hard to say for sure. If it's just 1 device, and you preferred, you could just try reinstalling the client. Otherwise, finding where it gets to in the process may help identify what it's choking on.
Thanks for the update, I managed to sort the issue out.
In our case the base file was running an EXE that when out to the internet to get some pre rec, but the account used did not have internet access due to a new web filter that was installed
Once the LANDesk account was added, it all worked well.
A strange one :-)