Public bug reported:

Using 20.04 updated on March 10, 2020. Freecad package
0.18.4+dfsg2-1ubuntu2.

Using Mesh workbench I was trying to create a mesh from solid using
"Create mesh from shape..." menu. Using default settings empty mesh was
created with no vertices nor edges (solid was not empty). Using python
console I tried to `import MeshPart` and got an error message
...libnglib.so not found...

Fix in 2 steps:
1) I had to install libnglib-6.2.1804. As mesh workbench is one of default 
workbenches of Freecad I suppose it should be a dependency for freecad package.
2) Package installs .so files into /usr/lib/x86_64-linux-gnu/netgen folder and 
the same error is still produced (even after ldconfig). After I added this 
folder path to x86_64-linux-gnu.conf and rerun ldconfig, `import MeshPart` 
works in Freecad's python console, and "Create mesh from shape..." produces 
usable mesh.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: freecad 0.18.4+dfsg2-1ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
Uname: Linux 5.4.0-14-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu19
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Mar 10 22:42:58 2020
PackageArchitecture: all
SourcePackage: freecad
UpgradeStatus: Upgraded to focal on 2020-02-16 (23 days ago)
modified.conffile..etc.default.apport: [modified]
mtime.conffile..etc.default.apport: 2014-02-28T14:49:36

** Affects: freecad (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal third-party-packages

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https://bugs.launchpad.net/bugs/1866914

Title:
  Cannot create mesh due to missing libnglib.so

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