Question : Oracle 11g "Alter Session" Error

I completed a migration from Oracle 10g on one server (Windows Server 2003)  to Oracle 11g on a different server (Windows Server 2008). Both are 32-bit servers. I used the export from 10g and the import from the 11g. Everything went well. All the data, constraints, roles, etc. were properly created.

The one critical problem is that the user who was testing the migration keeps getting an "Alter Session" error. Here are the remedies that I tried:

(1) Gave the user both Create and Alter Session privileges
(2) Used ALTER SYSTEM SET SEC_CASE_SENSITIVE_LOGON = FALSE; [This was originally an Oracle 8/NT database]
(3) Had the user reboot her computer
(4) Restarted the database
(5) Restarted the server.

Any suggestions on what to check?

I can log into the database from the server (SQL PLus) using her user id/password.

Answer : Oracle 11g "Alter Session" Error

do you use the same client version as she does to connect or are they different? Sounds like it could be a client issue.