IST422I
I/O ERROR ON DS datasetname RTN CD = major, minor

Explanation

An I/O error occurred on the checkpoint data set datasetname. major and minor are major and minor return codes from VSAM.

System action

VTAM® terminates checkpointing.

Operator response

Save the system log for problem determination.

System programmer response

This is probably a hardware error. Consult the applicable VSAM documentation for appropriate responses.

If this message is issued with RTNCD=X'0808' and datasetname specifies the NODELST data set or the CONFIGDS data set, then verify that the VSAM CLUSTER definition is correct. The KEYS parameter of the CLUSTER definition must specify the correct key length as stated in the z/OS Communications Server: SNA Network Implementation Guide

Routing code

2

Descriptor code

5