Hi Paul,
Thx a lot for your kind and detailed reply. The groovy script your shared is working fine and digest response is successfully calculated.
But when it comes to send the request again with Authorization Header, the server keeps replying 401 with new nonce challenge. the updated project and Wireshark trace are as attached.
A couple of things to add.
One property value was missing in the groovy script
init.setPropertyValue( "qop", qop);
Close bracket was missing after ${Properties#opaque" in the request Authorization header
The request Raw tab is an easy way to check the header to see if anything is missing
