Question: Error, (in dsolve/numeric/bvp/convertsys) too few boundary conditions: expected 3, got 2

Boundary condition of my problem is   f(0) =1  and  d(f)(1) = -(k[f]/k[nf])*Bi*f(1).

But i am getting error when solve this.How to clear this .

my attached file is,

HNF_1.mw

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