Using SOLVE with integration which has no explicit solution

Using the symbolic toolbox(Matlab R2012a), I want to solve for the root of f(y)=0. In the example below, the answer should be y=0. However, if I run the following codes, I get errors indicated further below. It seems that the integration with no explicit solution is causing the problem. I would appreciate any ideas for fixing this problem. Thanks.

-------------------------------

syms x y

f　=　y - int(exp(-(log(x))^2)*(y + y/x), x, 0.1, 1)；

solve(f, y)

---------------------------------

Error using mupadengine/feval (line 157) MuPAD error: Error: Second argument must be either of form x or x=a..b. [int]

Error in solve (line 160) sol = eng.feval('symobj::solvefull',eqns,vars);

[Walter Roberson]

f = -(1/2)*y*(sqrt(Pi)*exp(1/4)*erf(ln(2)+ln(5)+1/2)-sqrt(Pi)*exp(1/4)*erf(1/2)+sqrt(Pi)*erf(ln(2)+ln(5))-2)

and solve(f,y) gives y = 0

[Walter Roberson]

The error message suggests the possibility that in your actual code, you have given "y" a value.