The Quiesce or Unquiesce of the hierarchical file system (HFS) file failed because of an EBUSY return code indicating that the file system is either being unmounted or has already been quiesced.
Processing of the current invocation is ended.
Examine the return code and reason code. Refer to the appropriate information in z/OS UNIX System Services Messages and Codes for a description of return and reason codes.
The HFS file is 'busy'. Try the backup or restore later.
DFSMSdfp and File and Attribute Management Services.