COIMUNICATIONS SECTION 6. 9
6. 9 COMMUNICATIONS ERRORS
6. 9. 1
6.9.2
6.9.3
VER.V09F
HUNTER provides a range of communications error messages to warn
the user of failure situations. The error messages are designed
to be trapped by the Basic ONCOMMS statement (see section
5.16.3) and handled by the user's program.
However, the errors can occur when HUNTER is under manual
control (for instance, in TERM mode) or if the user's
application does not contain ONCOMMS.
In this event, HUNTER
will display:
***Communication Failure***
- - Error nn - -
where nn is the Error number. The attempt at communication can
be aborted either by powering the HUNTER off or by pressing
ENTER, in which case control is passed back to the DEMOS file
manager.
The available error messages are:
Error 01: Unanswered line bid
This is due to not receiving any reply in a request for the
line, usually caused by incorrect connection of the
communications channel. (Synchronous mode only).
Error 02: No response from receiver
After establishing the line, a buffer has been sent to which no
response has been given, despite 10 ENQs having been sent.
(Synchronous mode only),
Error 03: Response not matched by odd-even block count
The wrong positive acknowledgement has been given to a buffer,
despite confirmation requests. (Synchronous mode only),
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