Netgen not found

[SergioBini]

In PoP Os 20.04 (Ubuntu 20.04) Netgen not found in node editor when adding the Flovi NetGen Process Node

Blender 2.83.13 Paraview V8 VI-Suit 0.6 latest

[rgsouthall]

I'm going to need a bit more information than that Sergio. Is Blender using a built-in Python installation. What version of Python is it seeing? What does the terminal output say and/or the vi-suite-log file in the text editor?

[SergioBini]

Blender 2.83 LTS v.13 from a tar.bz by Blender site Download section No Blender trough ppt, but there is a standalone version of Blender 2.92 trough flatpack When adding the FloVi Netgen Process Node there's no messages return in the text editor. The system's version of python is 2.7.18, and here is the message I get in the Python console when asking to print the path, maybe could be useful:

print(sys.path) ['/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/startup', '/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/modules', '/home/sergiobini/blender-2.83.13-linux64/2.83/python/lib/python37.zip', '/home/sergiobini/blender-2.83.13-linux64/2.83/python/lib/python3.7', '/home/sergiobini/blender-2.83.13-linux64/2.83/python/lib/python3.7/lib-dynload', '/home/sergiobini/blender-2.83.13-linux64/2.83/python/lib/python3.7/site-packages', '/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/freestyle/modules', '/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/addons/modules', '/home/sergiobini/.config/blender/2.83/scripts/addons/modules', '/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/addons', '/home/sergiobini/.config/blender/2.83/scripts/addons', '/home/sergiobini/.config/blender/2.83/scripts/addons/vi-suite06-master/Python/linux', '/opt/openfoam8/bin']

I also have a FreeCAD version (0.19 daily) installed trough ppa repository, maybe it causes some interactions (I read somewhere that it's possible in some cases)

[rgsouthall]

You should get an error in the terminal when starting up Blender from the command line. What does that say?

On Tue, 30 Mar 2021, 08:32 SergioBini, @.***> wrote:

Blender 2.83 LTS v.13 from a tar.bz by Blender site Download section No Blender trough ppt, but there is a standalone version of Blender 2.92 trough flatpack When adding the FloVi Netgen Process Node there's no messages return in the text editor. The system's version of python is 2.7.18, and here is the message I get in the Python console when asking to print the path, maybe could be useful: [image: screenshot_1] https://user-images.githubusercontent.com/81572957/112950105-36e46300-913a-11eb-9ce9-70d48a4981f9.png

print(sys.path) ['/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/startup', '/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/modules', '/home/sergiobini/blender-2.83.13-linux64/2.83/python/lib/python37.zip', '/home/sergiobini/blender-2.83.13-linux64/2.83/python/lib/python3.7', '/home/sergiobini/blender-2.83.13-linux64/2.83/python/lib/python3.7/lib-dynload', '/home/sergiobini/blender-2.83.13-linux64/2.83/python/lib/python3.7/site-packages', '/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/freestyle/modules', '/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/addons/modules', '/home/sergiobini/.config/blender/2.83/scripts/addons/modules', '/home/sergiobini/blender-2.83.13-linux64/2.83/scripts/addons', '/home/sergiobini/.config/blender/2.83/scripts/addons', '/home/sergiobini/.config/blender/2.83/scripts/addons/vi-suite06-master/Python/linux', '/opt/openfoam8/bin']

I also have a FreeCAD version (0.19 daily) installed trough ppa repository, maybe it causes some interactions (I read somewhere that it's possible in some cases)

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[SergioBini]

This is what i get starting from command line:

~/blender-2.83.13-linux64$ ./blender Read prefs: /home/sergiobini/.config/blender/2.83/config/userpref.blend found bundled python: /home/sergiobini/blender-2.83.13-linux64/2.83/python libnglib.so: cannot open shared object file: No such file or directory libnglib.so: cannot open shared object file: No such file or directory Warning: class No_En_Con contains a property which should be an annotation! /home/sergiobini/.config/blender/2.83/scripts/addons/vi-suite06-master/init.py:656 assign as a type annotation: No_En_Con.resaws assign as a type annotation: No_En_Con.resawd assign as a type annotation: No_En_Con.resah assign as a type annotation: No_En_Con.resasm assign as a type annotation: No_En_Con.restt assign as a type annotation: No_En_Con.resh assign as a type annotation: No_En_Con.restwh assign as a type annotation: No_En_Con.restwc assign as a type annotation: No_En_Con.reswsg assign as a type annotation: No_En_Con.rescpp assign as a type annotation: No_En_Con.rescpm assign as a type annotation: No_En_Con.resvls assign as a type annotation: No_En_Con.resvmh assign as a type annotation: No_En_Con.resim assign as a type annotation: No_En_Con.resiach assign as a type annotation: No_En_Con.resco2 assign as a type annotation: No_En_Con.resihl assign as a type annotation: No_En_Con.resl12ms assign as a type annotation: No_En_Con.reslof assign as a type annotation: No_En_Con.resmrt assign as a type annotation: No_En_Con.resocc assign as a type annotation: No_En_Con.resfhb assign as a type annotation: No_En_Con.ressah assign as a type annotation: No_En_Con.ressac assign as a type annotation: No_En_Con.reshrhw assign as a type annotation: No_En_Con.restcvf assign as a type annotation: No_En_Con.restcmf assign as a type annotation: No_En_Con.restcot assign as a type annotation: No_En_Con.restchl assign as a type annotation: No_En_Con.restchg assign as a type annotation: No_En_Con.restcv assign as a type annotation: No_En_Con.restcm assign as a type annotation: No_En_Con.resldp assign as a type annotation: No_En_Con.resoeg assign as a type annotation: No_En_Con.respve assign as a type annotation: No_En_Con.respvw assign as a type annotation: No_En_Con.respvt assign as a type annotation: No_En_Con.respveff Warning: class No_En_Net_Sched contains a property which should be an annotation! /home/sergiobini/.config/blender/2.83/scripts/addons/vi-suite06-master/init.py:656 assign as a type annotation: No_En_Net_Sched.u1 assign as a type annotation: No_En_Net_Sched.u2 assign as a type annotation: No_En_Net_Sched.u3 assign as a type annotation: No_En_Net_Sched.u4 assign as a type annotation: No_En_Net_Sched.f1 assign as a type annotation: No_En_Net_Sched.f2 assign as a type annotation: No_En_Net_Sched.f3 assign as a type annotation: No_En_Net_Sched.f4 assign as a type annotation: No_En_Net_Sched.t1 assign as a type annotation: No_En_Net_Sched.t2 assign as a type annotation: No_En_Net_Sched.t3 assign as a type annotation: No_En_Net_Sched.t4 Warning: class No_En_Net_SSFlow contains a property which should be an annotation! /home/sergiobini/.config/blender/2.83/scripts/addons/vi-suite06-master/init.py:656 assign as a type annotation: No_En_Net_SSFlow.sfof4 Warning: class No_En_Mat_Sched contains a property which should be an annotation! /home/sergiobini/.config/blender/2.83/scripts/addons/vi-suite06-master/init.py:656 assign as a type annotation: No_En_Mat_Sched.u1 assign as a type annotation: No_En_Mat_Sched.u2 assign as a type annotation: No_En_Mat_Sched.u3 assign as a type annotation: No_En_Mat_Sched.u4 assign as a type annotation: No_En_Mat_Sched.f1 assign as a type annotation: No_En_Mat_Sched.f2 assign as a type annotation: No_En_Mat_Sched.f3 assign as a type annotation: No_En_Mat_Sched.f4 assign as a type annotation: No_En_Mat_Sched.t1 assign as a type annotation: No_En_Mat_Sched.t2 assign as a type annotation: No_En_Mat_Sched.t3 assign as a type annotation: No_En_Mat_Sched.t4 OpenColorIO Error: The specified transform file '/home/sergiobini/blender-2.83.13-linux64/2.83/datafiles/colormanagement/luts/srgb_inv.spi1d' could not be loaded. Invalid 'From' Tag

[rgsouthall]

That's more useful. Does a libnglib.so file exist in the vi-suite06/Python/linux addon folder and if so how big is it?

[SergioBini]

yes it does exist and it's 204,3 kB

[rgsouthall]

Hmm. The plot thickens. If you enter import os os.environ['LD_LIBRARY_PATH'] in Blender's python console what does it say?

[SergioBini]

it say

import os os.environ['LD_LIBRARY_PATH']

'/home/sergio/.config/blender/2.83/scripts/addons/vi-suite06-master/Python/linux'

[rgsouthall]

That looks right. I'm running out of ideas. So import netgen in the python console flags up missing libnglib.so problem too?

[SergioBini]

this is the report

import netgen Traceback (most recent call last): File "/home/sergio/blender-2.83.13-linux64/2.83/python/lib/python3.7/code.py", line 90, in runcode exec(code, self.locals) File "", line 1, in File "/home/sergio/.config/blender/2.83/scripts/addons/vi-suite06-master/Python/linux/netgen/init.py", line 16, in from . import libngpy ImportError: libnglib.so: impossibile aprire il file oggetto condiviso: File o directory non esistente

[rgsouthall]

Try moving the libnglib.so file to the netgen folder in vi-suite06-master/Python/linux/

On Wed, 31 Mar 2021 at 13:10, SergioBini @.***> wrote:

this is the report

import netgen Traceback (most recent call last): File "/home/sergio/blender-2.83.13-linux64/2.83/python/lib/python3.7/code.py", line 90, in runcode exec(code, self.locals) File "", line 1, in File "/home/sergio/.config/blender/2.83/scripts/addons/vi-suite06-master/Python/linux/netgen/ init.py", line 16, in from . import libngpy ImportError: libnglib.so: impossibile aprire il file oggetto condiviso: File o directory non esistente

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[SergioBini]

I tried to copy the file in /vi-suite06-master/Python/linux/ but it's still not working. But I noticed that my vi-suite06-master addon is in /.config/blender 2.83/scripts/addons/vi-suite-master, that's I think it's ok, but in this folder ther's the OFFiles folder and it hosts a linux/lib/ folders and there's an other libnglib.so into. This file is 136,8 kb while the file with the same name in Pyhton/linux folder is 204,3 kB as said previously.. Does it mean something?

[rgsouthall]

Shouldn't do. That OFFiles directory is obsolete as I no longer plan to bundle OpenFOAM with the Vi-Suite. Not sure what the problem is. A friend runs Ubuntu and I'll see if I can use his machine to debug.

On Wed, 31 Mar 2021 at 14:28, SergioBini @.***> wrote:

I tried to copy the file in /vi-suite06-master/Python/linux/ but it's still not working. But I noticed that my vi-suite06-master addon is in /.config/blender 2.83/scripts/addons/vi-suite-master, that's I think it's ok, but in this folder ther's the OFFiles folder and it hosts a linux/lib/ folders and there's an other libnglib.so into. This file is 136,8 kb while the file with the same name in Pyhton/linux folder is 204,3 kB as said previously.. Does it mean something?

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[Morrat]

I am having the same problem. Did you discover a solution?

[rgsouthall]

I haven't had a chance to get in front of an Ubuntu machine yet. Are you on Ubuntu as well?

[Morrat]

Yes, I installed Ubuntu 20.04 clean on a machine to try it out. I am not very experienced in using Linux. I've actually tried a couple of times in the past months in case there was something I left out during installation, but I haven't gotten it to work at all.

I am using Blender 2.83.15 LTS, OpenFOAM v8

All the other components works fine. It would be helpful to know the exact installation process I guess. If the location of the referenced plugin matters, or if there is a difference in Blender depending on how you install it, since there are so many different ways to do it. I am basically receiving the same errors as @SergioBini

I would also like to add that I have tried to run it on both VM and physical machines.

[ZeusNJ]

Hi all, Despite it is a little old post, did you manage to find a solution for this? I'm facing the same issue.

[Morrat]

Hi @ZeusNJ

Sadly I didn't, I tried all different sort of configurations, both using Ubuntu and ArchLinux, but kept getting the NetGen not found error. Although I managed to run the OpenFoam example simulations.

[ZeusNJ]

Hi @Morrat ,

How is that so? How did you manage to mesh your case if netgen is not working? I'm deeply interested since I'm trying to insert snappyHexMesh into this addon but firstly I wanted to know how it works. Could you be more specific about how did you managed to run your simulation?

Thanks in advance