Explanation
During system initialization, the system found
that the unit specified in the reply to message IEA317A contained
one of the following:
- An unacceptable device type for the data set volume to be mounted
- A volume that could not be demounted
System action
The system rejects the unit specification. The
system issues message IEA317A again.
Operator response
See the operator response for message IEA317A,
specifying an alternate unit. Ensure that the alternate unit:
- Is the proper device type for the volume to be mounted
- Does not contain a required system data set
- Is demountable
Source
Module