Error at visoptions

Hello,

I'm using NGSolve 6.2.2201 with python 3.8.10 and I get the following error when I call a visoption like

visoptions.deformation=0

ERROR: unexpected "," outside function argument list
in expression "100,000000/100"
errinfo: unexpected "," outside function argument list
in expression "100,000000/100"
    (parsing expression "100,000000/100")
    invoked from within
"expr $status_percent/100"
    (procedure "timer2" line 32)
    invoked from within
"timer2 "
    ("after" script)

Can you tell me, where the dog is hidden?
BR, Nepomuk

 

Hello,

Could you post a full example?

The visoptions comands append tcl-commands to a queue, which are batch processed by the tcl timer.
I suspect that the actual problem is happening earlier.

Best,
Matthias

Hello,

The error disappeared, when I removed the matplotlib module. I wasn't able to recreate the error in a minimum example, but in the one below, the GUI gets stuck (with or without the visoption command) if one imports matplotlib.pyplot.

Where does this come from?

BR, Nepomuk


import netgen.gui
# ngsolve stuff
from ngsolve import *
# basic geometry features (for the background mesh)
from netgen.geom2d import SplineGeometry
from ngsolve.meshes import MakeStructured2DMesh
# visualization stuff
from ngsolve.internal import *

import matplotlib.pyplot as plt

geo=SplineGeometry()
geo.AddCircle((0,0),1,bc="diri",leftdomain=1,rightdomain=0)
mesh=Mesh(geo.GenerateMesh(maxh=0.1))
Vh=H1(mesh,order=1,dirichlet="diri")
u=Vh.TrialFunction()
v=Vh.TestFunction()
a=BilinearForm(Vh,symmetric=True)
f=LinearForm(Vh)
a+=InnerProduct(grad(u),grad(v))*dx
f+=CoefficientFunction(1.0)*v*dx
a.Assemble()
f.Assemble()
gfu=GridFunction(Vh)
gfu.vec.data=a.mat.Inverse(freedofs=Vh.FreeDofs())*f.vec
Draw(gfu,mesh,"gfu")
visoptions.deformation=0
input("...")