OBIEE 11g: Error: "User Authentication Failure: BISystemUser" after Upgrade from OBIEE 10g BI Presentation Server will not Start
Last updated on SEPTEMBER 28, 2016
Applies to:Business Intelligence Server Enterprise Edition - Version 184.108.40.206.0  to 220.127.116.11.0  [Release 11g]
Business Intelligence Suite Enterprise Edition - Version 18.104.22.168.0  to 22.214.171.124.0  [Release 11g]
Information in this document applies to any platform.
After upgrading the repository and web catalog from OBIEE 10.1.3.4.1 to 126.96.36.199, the presentation server is not starting. It is gives the following error in the nqserver.log