writePpm, silently, does not produce images if Box3D does not represent a slice

I got the impression from the user guide that if a domain or a part of a domain is used (not a slice), an image will be generated. My guess was that it would probably represent the 3D domain boundaries in a default orientation, but this is not the case.

to reproduce the effect use the line in one of the tutorials. for writeGif
Box3D slice(0, nx-1, 0, ny-1, 0, nz-1);

if you use writePpm the pictures will not be generated silently.
if you use writeGif, you will get the following warning in :
Error in using ImageMagick convert command.
Error in removing temporary ppm file.

Best regard,

Dear Maka,

The writePpm function produces 2D images only, and works only on slices.

To visualize 3D data, you should write it in a VTK format and visualize it with a software like Paraview.