Within Identity Manager, error severities are defined as follows:
Fatal. A severe error that causes your system to crash, resulting in the loss or corruption of unsaved data.
Error. A severe error that might cause the loss or corruption of unsaved data. Immediate action must be taken to prevent losing data.
Warning. Action must be taken at some stage to prevent a severe error from occurring in the future.
Info. An informative message, usually describing server activity. No action is necessary.
You can check the Identity Manager System Log for more information about an error or exception message. (See Viewing Errors in the System Log Report.)