CKM02497W ATTEMPT FOR DYNAMIC allocation (n) HAS FAILED

Explanation
This message, accompanied by numerous IGD, IEF, or IKJ messages indicates
that a file was not available for dynamic allocation or dynamic unallocation.
This condition will NOT stop further execution of the BACKUP command. "(n)"
refers to a specific place in the module that detects this condition.

User response
Action varies depending on the DSN named in the IGD, IEF or IKJ messages.
Most likely, the problem is due to something amiss with the volume of a connected
user catalog or a non-existent VVDS.