"Unable to Meet Integration Tolerances"

I am receiving the following error:

Warning: Failure at t=7.032410e-09.  Unable to meet integration tolerances without reducing the step size below the smallest value
allowed (1.323489e-23) at time t. 
> In ode15s (line 730)
  In collisions7 (line 215) 
Unable to perform assignment because the size of the left side is 3-by-6 and the size of the right side is 2-by-6.

Error in collisions7 (line 216)
        Wposandvel(p).matrix((1+2*t):(3+2*t),(1:6)) = S; %Send solution vector to data structure

The odd part is that the error only occurs when I add this to one of the equations:

con*(s(3).^3)

Where "con" is defined in the following script and the added function is shown here (All of the equations are purposefully defined on a single line because when I gave them each their own assignments then redefined the vector that way as the documentation does in its examples, the solver does not produce correct answers at all):

function bdip = bdipuniodefun(t,s)

%Using SI units
q = -1.60217662E-19;
m_e = 9.11E-31;
%con = -2.5E+8;

persistent Bx By Bz

if isempty(Bx)
    [Bx, By, Bz] = B_test();
end

bdip = [s(4); s(5); s(6); (q/m_e)*(s(5)*Bz(s(1),s(2),s(3)) - s(6)*By(s(1),s(2),s(3))); -(q/m_e)*(s(6)*Bx(s(1),s(2),s(3)) - s(4)*Bz(s(1),s(2),s(3))); (q/m_e)*(con*(s(3).^3) + s(4)*By(s(1),s(2),s(3)) - s(5)*Bx(s(1),s(2),s(3)))];

end

"B_test" function file:

function [Bx, By, Bz] = B_test()

Bfieldstrength = 0.64; %In (Teslas)
magvol = 3.218E-6; %In (m)
mu0 = (4*pi)*10^-7;
magnetization = (Bfieldstrength*magvol)/mu0;

syms x y z
m = [0,0,magnetization];
r = [x, y, z];
B = mu0*(((dot(m,r)*r*3)/norm(r)^5) - m/norm(r)^3);
Bx = matlabFunction(B(1));
By = matlabFunction(B(2));
Bz = matlabFunction(B(3));

end

If that little piece of the function is not added, the ODE solver runs just fine. I feel that this should not be throwing an error because solving these equations are fairly trivial so I don't understand how the minimum "tolerances" are violated. What can I do to alleviate this error? I attached the main code also that calls this but view at your own discretion as it is around 400 lines (collisions7).