Message type code

The following type codes are used in IP messages:

A Action: The message indicates that an action is required.
E Eventual Action: You must eventually take some action to correct a problem. The system continues processing without waiting for a response.
I Information: The message is for your information. This type code can be used to notify you of an error. No response is necessary, but you might need to take some action.
S Severe Error: The message is for a system programmer.
W Wait: Processing stops until the operator takes a required action.