IBM 3745 Series Service Functions page 83

Errors during Diagnostics
DCF Unexpected Error Display
This screen is displayed after an unexpected error has been found by the DCF.
This is a
major
error; the diagnostic run cannot continue. (The following screen
is only an example, and should not be used for troubleshooting.)
***** ABEND *****
F1 : RETURN TO
~IAIII
I·IENU
===>
**************** ORIGIN: IIOSS<-DCI-I
*RII 3050541 * LEVEL: X '01'
*RAC 541 * LVLI-ISK: X'OO'
**************** ADDIT IMFO:
HAC I/O RC=X'1162'
OM I-IACRO KO OFS=058C
START 00:07:40 STOP 00:08:01
DIAG HUNG
UNEXPECTED ERROR
Fl:END F2:I-IENU2 F3:ALARI-I
Figure 3-15. DCF Unexpected Error Display Screen
Description of Unexpected DCF RACs
In catastrophic cases, such as erroneous logical status, or return code not null
after an I/O operation, the diagnostic control facility (DCF) displays a panel con-
taining a special repair action code (RAC) referring to an unexpected error.
These RACs may be requested by any DCF component:
OCM Diagnostic control monitor
CP MOSS Command processor - MOSS
CP CCU Command processor - CCU
CP CSP Command processor - CSP
During the investigation of an unexpected error, as a last possibility, you should
suspect a software error in the DCF.
Table 3-2 (Page 1 of 3). DCF Unexpected RACs
RAe Number Meaning
500-50F
Common RACs
501 Received event rejected by OCM
502 Received event rejected by CP
503 Routine not found by CP
504
SST access rejected by CP
505 Routine signature list end not known by OCF
507 CP CSP time out (no CP CSP answer to OCM)
508
IOCBUS time out (no TSS answer to OCM)
509 Unexpected scanner received event detected
510-51 F RAC related to disk operation
510
Invalid loading request
511
OCF load module
512 COF data set
3-22
3745 Communication Controller