Error message: CTGIMO020E The transaction is rolled back.
Luckily I was using Firefox or I would have encountered an even more useless error message from IE like "The Page cannot be Displayed". Internal Server Error".
After some research and some help from IBM, the problem truned out to be the WebSphere Embedded Messaging.
Transactions such as adding users will use the ITIM workflow engine which relys on MQ. If MQ is not running then you will get these error messages in your browser. So when I typed:
I got the following:
QMNAME(WAS_tim1_server1) STATUS(Ended unexpectedly)
So it looked like MQ was hosed. IBM sent me the following technote for Unix which solved the problem:
DCF Document ID: 1243466 - IBM Tivoli Identity Manager: Manually re-create the ITIM 4.6.0 Queues (MQ 5.3 and WAS 5.1.1) on UNIX
Problem Desc: From time to time, it is necessary to re-create the ITIM Queues that reside in MQ Series.
Solution: In the commands shown below - typical values for parameters are: