Visa stamping before the approval of location change amendment petition

Hi everyone,
My H1B petition got approved on 2016 October for client Y. On December my client and location got changed and now I’m working for client X.
Location change amendment has filed on january and waiting for approval.
My visa stamping date has been booked for next week.
Is location change amendment approval required for visa stamping or amendment acknowledgement is enough ?
Kindly help.

Could anyone help on this?

Can some one help on this? I do have same question