GetToken error when trying to view files on TLMS tape

Document ID : KB000122956
Last Modified Date : 13/12/2018
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We are getting this error when trying to view files on tape in Web Client or Windows Client:   

GetToken Failed. Run DSKTLMSU.

Any ideas what could be causing this?
The script DSKTLMSU must run again. It goes to submit the JCL TLMSDSKU which creates the TOKEN for the view.
You can from the view which fails force the script to run by selecting it from the Action menu. Once it will ends you will get the data back.
The script will populate the 2 TLMS view for Volume and Files.
Be sure that the JCL TLMSDSKU runs on the same Lpar where Vantage STC is running. Code the /*JOBPARM SYSAFF= card to force this when in a Sysplex.