AX-2012 Manufacturing

I am unable to estimate my production order due to following error

Production order FT-000003 could not be scheduled. Not enough capacity could be found

Kindly Advise

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http://blogs.msdn.com/b/axmfg/archive/2013/01/24/production-order-could-not-be-scheduled-not-enough-capacity-could-be-found-how-to-get-to-the-bottom-of-this.aspx