Client not updating from GUP.

Hi There,

I have a puzzling situation. 

I have a GUP configured (10.230.8.90) and it is able to update all clients in all subnets except for 1 particular IP (192.168.230.26)

I have another client in that same subnet (192.168.230.0/24) and it is able to update from the GUP successfully.

I have checked all the forum articles and enabled the logging. Attached is the sylink file.

Any advise or direction would be appreciated.

Thank you.

Trevor