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EViews says "Overflow or Illegal function call".

I am trying to estimate the following equation (EViews 7): http://i.imgur.com/G6cS584.jpg where V_Pj and V_Rj are variables and min and max are the minimum and maximum values of V_Rj . a , b , v and w are least squares parameters and Λ(v, w) represents the beta distribution. I tried something using ...