FCXxxx703E User login failed from `ip-address` for `userid` No Diag88 authorized.

Explanation
User userid attempted to log on to Performance Toolkit through the
web from IP address ip-address, but the external security
manager (ESM) did not allow Performance Toolkit to use DIAGNOSE X'88' to
verify the user ID and password.

System action
The home page (or logon page) is returned to the requester.

User response
Contact your support team to have them address the problem.