Error using pdepe to solve PDE

Unexpected output of PDEFUN. for this problem PDEFUN must return three column vectors of length 2 
Error in solve (line 13)
solution = pdepe(m,@pdefun,@icfun,@bcfun,x,t)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function [c,f,s] = pdefun(x,t,u,DuDx)

c = []; f = [0.024;0.170].*DuDx; 

y = u(1)-u(2) ;

F = exp(5.73*y)-exp(-11.46*y);

s = [-F,F];

%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function [pl,ql,pr,qr]=bcfun(x1,u1,xr,ur,t)

pl = [0;u1(2)]; ql = [1;0];

pr = [ur(1)-1;0]; qr = [0;1];

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function u0 = infun(x)

u0 = [1;0];

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

m =0 ; 

x = [0 0.005 0.01 .05 .1 .2 .5 .7 .9 .95 .99 .995 1];

t = [0 .005 .01 .05 .1 .5 1 1,5 2];

solution =pdepe(m,@pdefun,@icfun,@bcfun,x,t);

u1 = solution(:,:,1);

u2 = solution(:,:,2);

figure(1)

surf(x,t,u1)

figure(2)

surf(x,t,u2)

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/pdepe.html#f93-998662

"The input arguments are scalars x and t and vectors u and dudx that approximate the solution u and its partial derivative with respect to x, respectively. c, f, and s are column vectors. c stores the diagonal elements of the matrix c"

In your code

s = [-F,F];

is a row matrix, not a column matrix.

The message hints that your c will need to be a column vector of length 2 as well, whereas at the moment it is empty.

[khaznah alkhaldi]

many thanks :)

it works now