1. Introduction

The information directed by the INFO command keyword is information messages concerning the calculation process. They are contractual (for level 1) and, normally, they are documented in the user documentation.

The more detailed description of what a INFO is (or is not) is given in the document [D2.07.01], in summary:

• a INFO is neither a result, nor an alarm…,

• the INFO keyword can take 2 values: 1 or 2; the default is 1,

prints are made by WRITE and not by U2 MES <I>[D6.04.01]

• INFO are written on file MESSAGE

Since the prints are made by formatted WRITE, the only problems to be resolved are:

• on which logical unit?

• how to respect the user’s choice: INFO = 1 or 2?

This is the subject of paragraph §2 « How to send an information message ».

Another problem occurs when a command does not want a message that is always printed by a utility routine. This is the subject of paragraph §3 « Protecting yourself from an excess of messages ».