Receiving TCPIP ERROR: A communication subsystem partner link setup request failure

[KAS25]

I'm getting the same error when trying to connect from SAS to Z/os mainframe. When I use the IP everything works, but when I use the Name I get ERROR: A communication subsystem partner link setup request failure has occurred.
ERROR: The connection has timed out.
ERROR: Attempt to connect to server XXXXB failed.
ERROR: A communication subsystem partner link setup request failure has occurred.
ERROR: Cannot find TCP service 'XXXXb'. They tell me that DNS has been updated. Trying to figure out What or where I need to verify this or be able to test. If DNS is updated and still getting basically a DNS error seems like it then what can I check next?

Any help would be appreciated..

[SASKiwi]

Try PINGing the mainframe server name from your SAS computer. If it doesn't resolve then this is a network issue and nothing to do with SAS. Talk to your IT Network folks to resolve.

[Kurt_Bremser · Accepted solution]

Using ping will reveal if DNS knows the name and if it resolves to the same numeric IP address.

nslookup will additionally tell you which DNS server you use.

Note that these tests must be done on the computer running SAS.