My Husband waiver got approved he did his exam back in August 2012 does that mean he has to do it again

Exam for what? We need more information to help you.

Waiver for what? Exam for what?

For his green card

If you do want a precise answer, please explain...

My husband has been out of the country for 2 years now and we been applying for is visa so he went to his appointments and the last one they told him he will get a letter and so he did they wanted more poof of me suffering in the US so I sent in more letter and thing so in August 2012 he did his exam but feb 15 2013 his I 601 got approved :) so does that mean he has to do his exam Again?