This chapter describes how error messages are formatted. Within each facility, messages are listed by the severity level, from 1 through 7. Each message is followed by an explanation and a recommended action.
Messages appear only when the system remains operational.
The remaining parts of the messages are described in the rest of this chapter. A facility code consists of two or more uppercase letters that indicate the reference facility to which the message refers. A facility can be a hardware device, a protocol, or a portion of the system software. A severity level code is a single digit from 0 to 7 that reflects the severity of the condition. The lower the number, the more serious the situation.