M204.2720
M204.2720 VIO not allowed with XMEMOPT=2
An attempt was made to open a file whose DD card indicates a VIO data set, but the IOS Branch Entry feature is enabled by the XMEMOPT X'02' bit. When IOS Branch Entry is being used, VIO data sets may not be used as Model 204 files.
System manager response: Probably the use of the VIO data set should be eliminated. If VIO was being used for CCATEMP, it is much better to use CCATEMP in storage by setting TEMPPAGE. If there is a compelling reason to use a VIO data set, then the XMEMOPT X'02' bit should not be set, though this will adversely affect I/O CPU overhead and prevent the use of above-the-bar buffers (NUMBUFG greater than 0).
Message attributes:
| RETCODEO=0 | Sets online return code |
|---|---|
| RETCODEB=4 | Sets batch (single user) return code |
| CLASS=E | Error class; the message can be suppressed with the X'04' bit setting of the MSGCTL parameter |
| AUDITMS | Writes the message with line type MS to the audit trail |
| NOCOUNT | Does not increment the error count (ERCNT) parameter |