I have seen that error occur when a call to release a document is sent to the incorrect Collector server. From my experience, this will occur when there exists a hosts file entry that is resolving a server's NetBIOS name to an incorrect IP address. Please inspect the contents of Window's hosts file to see if it contains invalid entries.
The hosts file is located within %windir%\system32\drivers\etc\
I looked at the HostFiles as per your instructions and I have questions for you in regards to the IP Address listed. Sending you the email with information captured.
THANK YOU VERY MUCH TIM!
YOU'RE SIMPLY THE BEST
I have great appreciation of your knowledge and world class customer service.
Take Care My Friend...