Today I received an error message from a customer, that some users haven´t been able to launch the Files application.

I took a look in the SystemOut.log of the FileServer ( IBM CNX Large Deployment ) and saw the following error message / warning:

LTPAServerObj W   SECJ0371W: Validation of the LTPA token failed because the token expired with the following info: Token expiration Date: Mon Apr 18 18:12:00 CEST 2016, current Date: Mon Apr 18 22:59:53 CEST 2016 Token attributes:  port=8897, username=user:defaultWIMFileBasedRealm/CN=First Name,OU=USR,O=Company,C=AT, hostname=ic-node01.company.com.. This warning might indicate expected behavior. Please refer to technote at http://www-01.ibm.com/support/docview.wss?uid=swg21594981.

In the TechNote of IBM there´s an important information regarding this error:

Most SECJ0371W messages on WEB Inbound connections are harmless. The majority of these messages are logged as a result of an expired LTPAToken which are cached in browsers.

So I asked the concerned user to clear their browser cache and afterwards the problem has been solved.