Problem with Minimization

Hello.. Apologies if this appears twice. I tried to post a question yesterday but it did not go through.

I am new to Mathcad so I am sure this is a trivial question for the experts.

I am building a program which manipulates a bunch of 1x400 vector arrays then integrates 2 of the arrays (Runge-Kutta). The final result of one of the integrations is then minimized with respect to frequency. No problem with minimizing a simple analytic function, but I must have a bad syntax here.

So I built a simple exercize below to make it easier to see my mistake.

Given

Where am I going wrong?

Thanks, Al