openEMS.de

To run software in/from a not writable folder (at least for a non root user) is pretty much the default??
I would not see why the openEMS install folder should be writable...

I'm pretty sure that all this data is included in the nf2ff data returned by CalcNF2FF as this is what is plotted as a pattern for example.

regards
Thorsten

Are you sure you have the latest version? Because all of that mentioned in the link "should" be already fixed? As I said, it builds fine for me with vtk 9.0.x and 9.1 as it is... As for vtk, why is "VTK_QT_VERSION" not set in cmake for your vtk build? This is not related to openEMS at all. But as I ...

What breaking changes in vtk? It builds fine for me with vtk 9.1

And I'm still puzzled to why "VTK_QT_VERSION" is not set for your vtk? I have never seen that and really questioning if your vtk is build correctly.

Yes I understand, but then I don't know why the required Qt version cannot be read.
In any case, try to remove this from the if clause and see what happens...
In future openEMS will drop older vtk and qt4 support in any case.

Well then the gentoo vtk build is without qt5 support which makes it useless for this ...

Well that sounds to me like vtk was build without a Qt binding... That is not good and cannot be used for the openEMS GUI...

well in QCSXCAD/CMakeList.txt this line: if(${VTK_VERSION} VERSION_GREATER "6" AND VTK_QT_VERSION VERSION_GREATER "4") was false, which means vtk requested a "VTK_QT_VERSION" not greater than 4... This can only mean, your vtk was build with a qt4 binding or maybe a missing qt binding... You can mayb...

Then this can only mean that this vtk was build against Qt4?
That would be very weird???
What Linux is this? Did you use vtk coming with the distro?
I'm really lost how this can be possible...

Well cmake must have found a very old vtk version (<6.4)
Please check which one and maybe why...