When attempted to solve with MOSEK, any GP (except for trivial one) problem returns:

```
Subscript indices must either be real positive integers or logicals.
Error in cvx/shims/cvx_mosek.p>solve (line 367)
```

Matlab version: 7.13.0.564 (R2011b)

CVX Code: build 908 (w/Academic license)

Mosek 6.0.0.141

Sample GP that doesn’t work:

```
cvx_begin gp
variables a b
minimize a+b
cvx_end
```

Sample GP that works:

```
cvx_begin gp
variables a b
minimize a
cvx_end
```