ENHANCED_DAR_ENABLED is a NetApp environment variable and has nothing to do with Data Protector
https://library.netapp.com/ecmdocs/ECMP1196874/html/GUID-D66AA1AE-34D3-4A39-98A0-CD306876DA21.html
You can open a case with the response center if you heve a valid Service Agreement ID (SAID) by eithe calling 800-633-3600 or from this web site:
http://support.openview.hp.com/casemanager/newincident
if you have a valid SAID linked to HP Passport
