Browse Prior Art Database

Unexpected Error Concept

IP.com Disclosure Number: IPCOM000087433D
Original Publication Date: 1977-Jan-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 5 page(s) / 87K

Publishing Venue

IBM

Related People

Falkowski, GR: AUTHOR

Abstract

In a computer system, unexpected, as well as expected, errors are detected by diagnostic testing of a specific function via soft-copy maintenance analysis procedure (MAP) logic.

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Unexpected Error Concept

In a computer system, unexpected, as well as expected, errors are detected by diagnostic testing of a specific function via soft-copy maintenance analysis procedure (MAP) logic.

Unexpected errors (UE) are those errors that are not related to the test being performed. For example, a print quality test for a printer would not expect a channel error. The channel error would be an unexpected error. The indication of an unexpected error (Fig. 1) is returned to the MAP Diagnostic Integration (MDI) processor in a nonzero return code from the diagnostic test.

Typical causes of unexpected errors are:
1. Error is intermittent and doesn't appear higher up in MAP

logic due to timings, etc.
2. MAP technically incorrect (all possible errors not defined).
3. error accidentally caused by customer engineer (CE) (shorted

pin, wrong setup, loose cable, etc.).
4. Design error in system software.
5. Second failure (solid or intermittent) appears in process of

isolating to first solid failure.

The following examples illustrate the options made available to the CE in the event that a UE occurs. Return Code 01.

This return code can be used by all modules on the good-machine path (GMP) (Figs. 2 and 3) to indicate an unexpected error. Message presented to the CE will be:
UNEXPECTED ERROR OCCURRED --------------- RTNCODE STATUS DATA:

XXXX

OPTIONS AVAILABLE:

1 LOOP ON THIS NODE

2 LOOP TO THIS NODE FROM A GMP ENTRY POINT

3 RESTART AT THE GMP ENTRY

- ENTER OPTION LOOP COUNT=XXXX NODE = XXXX...