Function Divergence under Matlab, but no divergence under Mathematica !

Hi !

I evaluate a function both under Matlab and Mathematica. Matlab ends up with a divergence whereas Mathematica computes proper values.

Here is the caller code :

tau = 15.1605;
a = 37.4046; tau1 = .1711; t1 = .2161;
b = 1.1417; tau2 = -15.5449; t2 = 21.3254;
xc1=(119.1:.01:119.8);
theoC = myModelFunc1( xc1, tau ,tau1, tau2,...
                      t1,  t2,  a, b);

Attached with this question, the function code : myModelFunc1.m.

May I ask you why such a matlab divergence issue ?

Regards