Hi

I was working through the Stokes iTutorial and noticed an issue.

In input blocks 9 and 10, I get an error:

```
V = H1(mesh, order=2, dirichlet="wall|inlet|cyl")
V.order[TRIG]=3
```

`AttributeError: 'ngsolve.comp.H1' object has no attribute 'order'`

I eliminate the AttributeError if I change this line to:

`V.SetOrder(element_type=TRIG, order=3)`

But instead of the expected output, I get this:

V.ndof = 1702 , Q.ndof = 2382

[code]---------------------------------------------------------------------------

RuntimeError Traceback (most recent call last)

in ()

5 Q = L2(mesh, order=1)

6 X = FESpace([V,V,Q])

----> 7 gfu = SolveStokes(X)

8 velocity = CoefficientFunction(gfu.components[0:2])

9 Draw(velocity, mesh, “vel”)

in SolveStokes(X)

16 res = gfu.vec.CreateVector()

17 res.data = -a.mat * gfu.vec

—> 18 inv = a.mat.Inverse(freedofs=X.FreeDofs(), inverse=“umfpack”)

19 gfu.vec.data += inv * res

20 return gfu

RuntimeError: UmfpackInverse: Numeric factorization failed.[/code]

Best,

Dow