Hi,

I’m trying to solve a modified LASSO where weights are constrained to be nonnegative, using StructuredOptimization.jl. The documentation suggests this should be possible using a code similar to the one below :

```
using StructuredOptimization
n = 5
p = 10
A = rand(n, p)
y = rand(n)
x = Variable(n)
@minimize ls(A*x-y) + norm(x, 1) st x >= 0.
```

This however gives me the following error message :

“Sorry, I cannot parse this problem for solver of type PANOC{Float64}”

Does someone (maybe @nantonel or @lostella ?) have any idea what is wrong with this ? Thanks anyway for developping this package which I have found extremly useful and easy to use aside this particular case