A VARY command was issued for an IQD (internal queued direct) device. The device is not allowed to come online because all the completion vector slots have been assigned.
The VARY command fails. If VARY dddd,ONLINE was issued, the device remains offline. If VARY PATH(dddd,cc),ONLINE was issued, the device path remains offline.
There is an MVS™ implementation limit for the number of IQD devices that can be online at one time (currently 1023). Online IQD devices may be varied offline, so that completion vector slots can be freed and the offline IQD devices can be brought online.
There is an MVS implementation limit for the number of IQD devices that can be online at one time (currently 1023). Change the configuration definition to remove the devices that cause MVS to exceed this limit.
IOS device service exit for OSA and IQD (IOSVDSEO)
IOSVDSEO
2,10
11