Appendix D. Messages

GDDM-PGF V2R1.3 OPS User's Guide

Appendix D. Messages

GDDM-PGF V2R1.3 OPS User's Guide
SC33-1776-00

Messages provide information or report errors.

OPS displays messages in response to direct commands in the message field, using the current field attributes as set by default or by the MSGFLD command.

OPS displays messages in response to infile commands on a special panel showing the erroneous command as well as the original input line. If a parameter error occurs before the main panel has been displayed, the message is written directly to the screen in line mode.

Most information messages are suppressed in DARK mode; some are also suppressed if the cause is an infile command.

Messages are classified as:

I

These are for information. They tell you about status changes, such as loading a symbol set.

W

These indicate that something might be wrong, such as loading a GDF, and overwriting a symbol set in use.

E

These are issued in response to syntax errors, missing external files, and so on. The requested action cannot be accomplished. In most cases the original status is preserved.

S

These are errors that either prevent OPS from continuing, or that occur before the primary page is created. In the latter case, execution is discontinued, because the reason for the error might be outside the user's control (such as an error in a local OPS startup procedure or menu function) and the user would not otherwise be aware of this fact.

With the exception of severe error messages, messages are by default displayed without classification or number. You can display both with the command:

MSG LONG

You can also query the last message, using the QUERY command:

QUERY MSG

which displays the last system message in LONG form.

Subtopics:

D.1 Message listing

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