O OFF Suppress output in Conn. (Output Off)

The Connection Handler of CFS offers the possibility of suppressing all output messages in a subtask, whether produced by a user program, or by the system:

O OFF [,file] All output in the current connection is immediately prevented from appearing on the screen. Output that refers to an input request (e.g. '/') is not affected, and is still displayed on the screen.

file If the optional file name is given, all suppressed output is written to this file instead.

O ON All output for the current connection is displayed again.

Notes:

An example of the use of the O OFF command is a program test using IDA, where a program counter is set at a particular halt point. The halt point can occur very frequently, and at each point IDA displays a message on the screen. Displaying these messages takes relatively long, and delays the program execution.

Using the O OFF command will speed up the runtime of the program to be tested if the messages produced by IDA are suppressed.

The commands O OFF and O ON can also be used in a DO procedure if the comments /WR-T 'O OFF ...', or /WR-T 'O ON' appear on the screen.

If output is suppressed from the screen and written to a file with the command O OFF,file, and if that same file is reopened following an O ON command, then that file will be opened in EXTEND mode, and not OUTPUT mode.

By setting an option, the System Administrator can generate CFS such that all commands destined for the Connection Handler must be preceded by the escape symbol. Setting and resetting the suppression of output messages must then be achieved by ^O OFF, or ^O ON respectively. To check if the ^ option is set, display the CRD mask (CRD command).