Please help!

I’m getting the error "Invalid constraint: {log-concave} < {real constant}"

so I printed the output and found that the it became concave when it’s the product of posynomials. However in this link “http://cvxr.com/cvx/doc/gp.html” it’s stated that the product of two posynomials is a valid posynomial expression.

- So what exactly do you mean by stating it’s a valid posynomial expression ?

2)Do you have a proposition concerning how can I solve this problem ?

Also can’t I just access the output at each iteration in cvx instead of having only the size and type of the output printed? as it’d be much easier to debug.

Your help is really greatly appreciated.