The text read off it
[90.04.02]
B. Severity Codes
The Severity Codes (values) are numbered 1 through 5. The least severe errors have a code of 1. The most severe errors have a code of 5. The ascending sequence, 2, 3, and 4 indicates the degree of severity between the least and most severe errors, 1 and 5.
An error severity code of 1 does not prevent the running of the object program immediately after compilation. Any code above 1 does prevent running of the object program immediately after compilation. That is, the compiler will not compile and go.
An error severity code of 5 causes the compiler to stop compiling. It then proceeds to the next job.