Problem with results visualization

[Julio César Ocaña Lagos]

Hi everyone, i installed pysph and all packages needed, and still can't watch the results in mayavi. I've tried the solutions in previous messages but mayavi still displays a black screen, and the command consoles shows the message "ValueError: Object arrays cannot be loaded when allow_pickle=False".

Any suggestion is highly appreciated

Thanks to everyone working on pysph

[mutaa...@gmail.com]

Can you give us more info about the OS, the python version, vtk version, mayavi verison, and the command you are using to view the output.

Best,

Abhinav

[Julio César Ocaña Lagos]

I'm working on Windows 10, python 3.7, vtk 9.0.1, mayavi 4.7.2 and i'm using the pysph view folder_output to watch the results and shows this classical black screen. Anything i'm doing wrong or missing? I've followed every suggestion and

solution from the pysph page and previous messages.

[mutaa...@gmail.com]

I am not familiar with this error. Do you see any messages in the terminal window. Perhaps you could try a simple mayavi example, like, go to python do: 

`from mayavi.mlab import *' and then do

 'test_plot3d()'.

 This should open a window and show you some graphic plot. If this is busted then there could a problem with your graphics backend like pyqt5.

[Julio César Ocaña Lagos]

I did it, and it still displays a black screen, however i can see the plot only when i save it as an image file. Here's the screenshot i took. What graphics backend do you recommend? Thank you.

[mutaa...@gmail.com]

This may not be a backend issue, as your plot is correctly generated. This could be an issue with your AMD (as inferred from your terminal) graphics or if you are using some other graphics card the drivers needs to be updated. This is what I think.

[Prabhu Ramachandran]

On 4/14/21 09:37, Julio César Ocaña Lagos wrote:

Hi everyone, i installed pysph and all packages needed, and still can't watch the results in mayavi. I've tried the solutions in previous messages but mayavi still displays a black screen, and the command consoles shows the message "ValueError: Object arrays cannot be loaded when allow_pickle=False".

Any suggestion is highly appreciated

The latter error is possibly because you are using the pysph version from pypi.  Please use the github version (this is discussed here: https://pysph.readthedocs.io/en/latest/installation.html#downloading-pysph)

As regards the viewer being entirely black.  This could be an issue with your particular pyqt version.  What pyqt version have you used?  PySide2 has worked well for me.

If you have pyqt you can do this:

pip uninstall pyqt qt
pip install pyside2

and see if that works.

Are you using conda/anaconda? 

Regards,
Prabhu