claw.50a02b <bus ID of the device>: The device is not a CLAW device
Explanation
The Common Link Access to Workstation (CLAW) device driver received a
channel interrupt (IRQ) for a subchannel that is not a CLAW read or write
subchannel. A CLAW subchannel must be configured for a 3088 device of
type x'61' and have an even bus ID.
User response
Assure that the subchannels have been defined correctly to the real or virtual hardware, for example, in your IOCDS or in your z/VM® configuration.