Question: minimizing an objective function coefficients and the variable to be optimized are in matrix form with equality constraint

I have to find an optimal matrix V such as the objective function was minimized. I was tryed two function (Minimise and NLPSolve) and both of them doesn't work.
I have this error :
Error, Got internal error in Typesetting:-Parse:-Postprocess : "internal error: invalid object "
such that the objective function have this form:
obj := (V.Hd.transpose(Hd).transpose(V))/(V.Hf.transpose(Hf).transpose(V))
PS: Hd, Hf and V are all a matrix. Here, we want to optimize V.
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