[SOLVED] cavity.OpenFOAM file empty, what to do?

cavity.OpenFOAM file empty, what to do?

I'm trying to learn how to use OpenFOAM. To do so, I'm working my way through the cavity example, found here:

https://cfd.direct/openfoam/user-guide/v8-cavity/

In step 2.1.2 Viewing the mesh I run paraFoam and a window opens called ParaView 5.6.0 64-bit. The render view of the window is empty (see screenshot). I expect to see a mesh here, as shown in the tutorial. I cannot select a coloring in the window, because the Display tab is empty, even when I click the little cog wheel at the top of the tabs.

I found that the file cavity.OpenFOAM, which is generated by paraFoam, is empty, i.e. it has zero bytes.

$ icoFoam -help
[...]
Using: OpenFOAM-7 (see https://openfoam.org)
Build: 7-1ff648926f77

Solution

cavity.OpenFOAM is always a 0 byte file.

In ParaView make sure to select the required Mesh Parts before you hit apply. select Mesh Parts'
After hitting apply, change the view from 'Surface' to 'Surface With Edges Surface With Edges