If you use this manual regularly, you should read this section along with the following section "Message Format and Associated Text". They provide information that is helpful when you use this manual for reference.
All messages have four digits following the ARI or ASN prefix. Old 3-digit messages are now preceded by a zero. For example, ARI201E is now ARI0201E.
The table of contents can help you in looking up a particular message,
code, or error because headings are provided to show the numeric sections and
page locations. You can also use the index at the back of the book to
find the page or pages of any particular message or code.