How Do IPass a Double by Reference into a COM Object's Methods

I am trying to implement this method in matlab (Originally C#):

short RunFrozPredict(out double Cycles, out double finalC, out double finalKc, out double finalA, out double finalKa, out double finalCt, out double finalKct)

This is the code I wrote to try this:

cyc = 0;
fc = 0;
fkc = 0;
fa = 0;
fka = 0;
fct = 0;
fkct = 0;

invoke(afgrow, 'RunFrozPredict', cyc, fc, fkc, fa, fka, fct, fkct)

And this is the error message I am getting

Error using COM.Afgrow_Application/invoke
Error: Type mismatch, argument 1

Thanks for any help

[Walter Roberson]

You and Cordell should consider working together https://www.mathworks.com/matlabcentral/answers/406857-how-to-pass-a-double-value-by-reference