DFS2150I MTM I/O ERR PC=xxcccccc LINK=xxxx.


or

CTC ERR RC=xx LINK=xxxx.


or

hh:mm:ss CTC IO ERR PC=xx REASON=xx OP=xx LINK nnnn RSTARTED.


or

MTM ERR RC=xx LINK=xxxx.

Explanation

An I/O error has occurred.

In the message text:
RC
The return code
PC
The post code
REASON
The associated channel-to-channel reason code
LINK
The link number
OP
The attempted CTC operation
hh:mm:ss
The time

If message DFS2150I...LINK nnnn RSTARTED is issued, the link was stopped and then restarted by IMS. If message DFS2150A...LINK nnnn STOPPED is issued, IMS attempted to restart the link, but was unable to do so.

The following channel-to-channel operations apply:

Operation

Code (hex)
Meaning
04
WRITE: write a buffer.
08
ACK: acknowledge input.
0C
WRACK: write a buffer and acknowledge input.
10
STARTUP: establish connection.
14
SHACK: acknowledge input and shut down the connection.
18
SHUTDOWN: shut down the connection.
1C
READ: read input.
The following channel-to-channel return codes and meanings are possible:

Return

Code (hex)
Meaning
04
Logic error: IOSB is not busy on ACK or WRACK.
08
Logic error: ACK or WRACK is issued, and no message is received to acknowledge.
10
Logic error: on STARTUP, there is an invalid value in DECWAREA, DECWLNG, DECAREA or DECLNGTH.
14
Probable I/O error: on attention interrupt.
18
Paging error: at STARTUP.
1C
Logic error: in module DFSCMC50 at STARTUP.
20
Logic error: STARTUP issued, but link is already connected.
24
Logic error: SHUTDOWN issued, but link is already shut down.
28
An I/O error or an abnormal condition was detected during SHUTDOWN, and SHUTDOWN was successfully executed.
The following table shows the possible post codes, associated reason codes, and their meanings:
Table 1. Possible post codes, associated reason codes, and meanings for DFS2150I
Post reason code Code (hex) Meaning
7F any I/O complete without error
7F 04 Startup: Link available for write
7F 08 Startup: message received
7F OC Message received
7F 10 Shutdown received
7F 1C Acknowledgement received
7F 20 Acknowledgement with data received
41 any I/O error detected
41 01 Error in attempting to determine command in adapter
41 02 Invalid command in adapter
41 03 Error in reading message
The following real storage-to-real storage connection return codes and meanings apply:

Return

Code (hex)
Meaning
12
Window is not open or not found.
16
Window is allocated to two other systems.
20
Invalid input.
24
IEAMSCHD failed: partner has terminated.
28
Buffer lock failure.
32
Buffer lengths are not equal.
36
Caller is not authorized.
40
Main storage-to-main storage access routine is defined for a different OS.
44
Window queue header block is bad or is not initialized.
48
GET or GETMAIN failure.
52
PGFIX or PGFREE error.
The following real storage-to-real storage post codes and meanings apply:
Post code
Meaning
41RD
Read error: partner already reading.
41CLS
Read or write error: partner closed in mid-operation. The most probable cause is an abend of the partner.
41BUF
Read or write error: I/O buffer lock failure.

Operator response

For CTC message DFS2150A, assign a backup link, if available. For MTM or CTC DFS2150I, when the link is not restarted, attempt to restart the link.

Problem determination

CTC is an I/O or probable logic error. If it is an I/O error, z/OS® error message IEA000I appears on the system console.

MTM is a probable real storage-to-real storage access method logic error.

A type X'67' log record was produced, containing all relevant blocks.