Control Data Corporation CYBER 170 Series Operator's Manual page 246

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MESSAGE
NULL DESCRIPTION FILE.
NVF NETOFF, NAM NOT PRESENT.
NVF NETON REJECTED BY NAM.
NW01,hhhh,FF c sss.
SIGNIFICANCE
Self-explanatory.
NVF attempted to interface with NAM when
NAM was not running and therefore NVF
terminated.
NVF's attempt to interface with NAM was
rejected even though NAM was initialized and
network shutdown was not in progress.
Error log message indicating that the
interface between PIP and the NPU!coupler is
not working properly.
hhhh Coupler node
c One of the following error codes.
1 Channel empty too long or
inactive
2 Channel active too long after
function
3 Channel full after output
4 (Reserved)
5 Coupler did not put status on
channel
6 Error retry on input
transmission
7 Channel full after activate on
channel
8 Channel inactive after output
9 Channel full before function
tried
A Read interrupted by disconnect
B Waited for NPU status change
too long .
C Incorrect coupler status after
write
D NPU dead
E Inbound message too long
F Abnormal coupler status
register contents
(sss = 12-bit register contents
in hexadecimal code).
Or NPU load compare fault (if
sss=O).
sss
Co~tents
of 12-bit register if c=F.
Otherwise 000.
ACTION
Create a description
file (NETWid, SIMFid, or
NCTFid where id is the
machine identifier).
None.
Enter ENABLE, NVF. If
this does not work, drop
the network and inform
the site analyst.
Inform site analyst.
ROUTINE
TAF
NETVAL
NETVAL
PIP,
NS