When you use a SAS^® Cloud Analytic Services (CAS) statement to connect from a SAS 9.4 client to CAS, which is deployed on Windows, the connection fails with a Kerberos authentication error, as shown here:

The following syntax is an example of the code that can introduce this error:

When this problem happens and you look at the cas_date_host.log file in %ProgramData%\SAS\Viya\var\log\cas\default\, you also find the error shown here:

Note: This problem does not occur when you create a CAS session using SAS^® Studio 5.x.

A fix for this issue is planned for a future software release. 

Workaround

To work around the problem, create a Windows System environment variable CASPACKAGELIST on the Windows server for SAS^® Viya^®.

1. On the Windows server, define the Windows environment variable CASPACKAGELIST and set the value to Kerberos exactly as shown in the image below:
   
   
   
    
2. Stop and restart the CAS service for the change to take effect.
    
3. From your SAS 9.4 client, submit a CAS statement to create a session. Verify that the session is connected successfully to CAS.

   An example of a successfully submitted CAS statement connection is shown here:

      options set=casclientdebug=1;
      options set=cas_auth_method=kerberos;
      options cashost="your-host.your-domain.com" casport=5570;
      cas mysess sessopts=(caslib=casuser metrics=True);

      Note: The session MYSESS connected successfully to Cloud Analytic Services your-host.your-domain.com using port 5570. 
      The UUID is cffab52f-e9a4-457e-adb8-2e707b38c7c1. The user is user name and the active caslib is CASUSER(user name).

Operating System and Release Information