Hi Jaclyn Thank you for your interest and response. First of all I am doing PoC and got this environment ova from delphix. You know the procedures :).. I read all these documents and also check your doc too if I missed but all docs are same :) just some sentences are different Here is what I did ; I provisioned two VDB ( one is for validation ) I created application, connector ( to this vdb and database name ) , ruleset, algorithm and assign this algortihm in inventory and also created masking job. I can mask data from masking engine gui btw. My real pain ; I cant run this masking job from DE gui even I associate it to the dsource on the card of dsource, masking section. After I assoiciate it to VDB I refresh this vdb to trigger that masking job and also I tried provision the vdb to another with masking job. Note : I didnt understand the way exactly but I also associate that masking job in the same way to dsource. And this time when I provision dsource It gives error " hook operations doesnt work for dsource ... " something like this Please confirm the way first if u have any idea and then we can go troubleshooting Thanks in advance