The subsystem is activated by issuing the APPCCONTROL START command. The APPCCONTROL START command can be issued from any user terminal by anyone
with NM capability. Once the command is issued, the APPC subsystem
and all APPC sessions configured for automatic activation will come
up. (Automatic activation is discussed in Chapter 4 “APPC Subsystem Configuration” "APPC
Subsystem Configuration.")
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 | NOTE: The APPCCONTROL START command will not cause the activation of the SNA link
product if it is not already activated. The SNA link product must
be explicitly activated using the SNACONTROL START command. |
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When the APPC subsystem starts up, it generates startup and
logging messages. These messages tell you how activation is progressing. Logging
messages can be directed to the system console, a disk file, or
a user terminal (depending upon configuration). The startup messages returned
by the APPC subsystem are directed back to the terminal from which
the APPCCONTROL START command was issued. The startup messages you should see
after issuing the APPCCONTROL START command are shown below:
:APPCCONTROL START
APPC: Subsystem start up begun.
APPC: Opening internal trace file - NMTCnnnn.PUB.SYS or user trace file.
APPC: Control Operator start-up completed. |
At this point, the APPC subsystem is active, but no sessions
have been started yet.
APPC subsystem logging messages record the establishment of
APPC sessions. Typical messages are shown below. They could be directed
to a user terminal, the console, a disk file, or all three.
APPC: Subsystem Started (APPCLOG 0).
APPC: Session Started, Session ID=41 (APPCLOG 6).
APPC: Session Started, Session ID=42 (APPCLOG 6). |
If, for any reason, the APPC subsystem is unable to execute
the APPCCONTROL START command, an error message will be displayed on the terminal
from which the command was issued. Appendix A “Messages” lists
APPC subsystem error messages, their meanings, and the actions you
should take to resolve errors.
If you configure more than 256 sessions for automatic activation,
the following messages will be generated:
SESSION LIMIT EXCEEDED, REMAINING SESSION IGNORED. (APPCWARN 1201)
APPC: SNA/LINK Error, Session ID=43, Result=! (APPCLOG 11)
APPC: Session Stopped, Session ID=43, Reason=SNA_Error (APPCLOG 7) |
The first message will appear on the terminal from which the APPCCONTROL START command was issued. The remaining two are logging messages;
they will be logged to the destinations configured.
