Error installing VMBACKUP

Document ID : KB000127123
Last Modified Date : 14/02/2019
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Issue:
I'm in the process of installing VMBACKUP on a new VM 7.1 system. I got to step 4.1 Copy Product Materials to Runtime Areas and I'm to run command VMRMDS.
When I issue the command I get the following: VMR022S VMRMDS requires that the directory reader diagnose is installed in order to collect minidisk information.

Not sure what I need to do at this point. I have VMANAGER installed with all the PTF's applied and I don't think I missed anything. 
Resolution:
Customer was missing the Directory Reader Diagnose which must be installed and loaded first. If you are running z/VM 7.1, the z/VM release-specific Directory Reader Diagnose (VMNDLK71 TEXT) must be installed.
Additional Information:
The Directory Reader Diagnose (VMNDLK) must be installed for some of the install tasks to complete. 
Each release of z/VM requires a new VMNDLK. 

To place the diagnose into effect now, you can do so interactively with the following commands:

Two DEFINEs and one CPXLOAD: 

CPXLOAD VMNDLK71 TEXT * NOCONTROL LET TEMPORARY 

DEFINE DIAGNOSE 100 ENABLE EPNAME VMNDLKUP PRIVCLASSES E CHECKR15 YES 

DEFINE COMMAND VMNDLK ENABLE EPNAME VMNDLKCP PRIVCLASSES E IBMCLASS E