Spatial discretization has failed. Discretization supports only parabolic and elliptic equations, with flux term involving spatial derivative. error

my boundries are

a(1)=1 a'(0)=0

b(1)=0 b'(0)=0

the code i used is

function [pl,ql,pr,qr] = pdex4bc(~,ul,~,ur,~)

pl = [0;ul(1)-1];

ql = [1;0];

pr = [0;ur(2)];

qr = [1;0];

but i get this following error

Spatial discretization has failed. Discretization supports only parabolic and elliptic equations, with flux term involving spatial derivative

what is the wrong i did

[Torsten]

Please post your complete model formulation.

The error does not seem to address the boundary conditions, but the PDE system itself.

[Mallikarjuna M]

I appled another boundary value for the same system i get the output but for only this boundary i couldn't get the boundary

function steady

m = 0;

x = linspace(0,1);

t = linspace(0,1000);

sol = pdepe(m,@pdex4pde,@pdex4ic,@pdex4bc,x,t);

u1 = sol(:,:,1);

u2= sol(:,:,2);

%figure

plot(x, u1(end,:),'r')

hold on

%title('u1(x, t)')

%xlabel('Distance x')

%ylabel('u1(x,t)')

%figure

% --------------------------------------------------------------

function [c,f,s] = pdex4pde(~,~,u,DuDx)

phi=0.1;al=0.1; %These parameter values are used in Fig.2

c = [1;1];

f = [1;1].* DuDx;

F1=-9.*phi.^2.*(u(1)./1+u(1)+u(2));

F2=-9.*al.^2.*(u(2)./1+u(1)+u(2));

s = [F1;F2];

% --------------------------------------------------------------

function u0 = pdex4ic(~)

u0 = [0; 0];

% --------------------------------------------------------------

function [pl,ql,pr,qr] = pdex4bc(~,ul,~,ur,~)

pl = [0;ul(1)-1];

ql = [1;0];

pr = [0;ur(2)];

qr = [1;0];

[Torsten]

pl = [0;0];
ql = [1;1];
pr = [ur(1)-1;ur(2)];
qr = [0;0];

sets

a'(0) = 0, b'(0) = 0, a(1) = 1, b(1) = 0

And I think

F1=-9.*phi.^2.*(u(1)./1+u(1)+u(2));
F2=-9.*al.^2.*(u(2)./1+u(1)+u(2));

should read

F1=-9.*phi.^2.*u(1)./(1+u(1)+u(2));
F2=-9.*al.^2.*u(2)./(1+u(1)+u(2));