### $p$-adic regulator calculations

Why can't some $p$-adic regulators be calculated? The first case where this happens is the curve 3314b3. I received the following error message after using this code:

```
x = EllipticCurve("3314b3"); x
```~~r=x.rank(); ~~r = x.rank(); r
~~p=7
~~p = 7
x.is_good(p) and x.is_ordinary(p)
reg = x.padic_regulator(p,prec=7); reg

RuntimeError: Unable to compute the rank, hence generators, with certainty (lower bound=0, generators found=[]). This could be because Sha(E/Q)[2] is nontrivial.
Try increasing descent_second_limit then trying this command again.