Assembly 3 - no solver backend... (solved)

[bambuko]

I got it working on 0.19 by copying the workbench from linkstage3 package...

Just a quick follow up and thank you!
In the end I did exactly as you suggested and copied asm3 folder from Link Branch version and it all works fine now.
I have Assembly 3 workbench in all three versions of FreeCAD (0.19 and 0.20 and LinkBranch).

I like assembly 3

[pk_rulz]

Can you please specify what exactly do you do.
Copying asm3 folder from unzipped Linkstage 3 ie after unzipping file FreeCAD-asm3-Stable-Win64-Py3-Qt5-20210519.7z
available at https://github.com/realthunder/FreeCAD_ ... 3/releases to
C:\Users\<NAME>\AppData\Roaming\FreeCAD\Mod
in FreeCAD official version 0.19.2 did not solve the problem from me and I still continue to get no solver backend warning

Also FreeCAD-asm3-Stable-Win64-Py3-Qt5-20210519.7z when unzipped contained this

Asm3Struct.png (27.7 KiB) Viewed 3060 times

[C_h_o_p_i_n]

Hi,

I might be wrong ...

.. this might be caused due to @realthunder uses a kind of external solver in his linkstage3 branch which is not part of the "default" freecad master branch distribution ?!

regards,
Stefan

[pk_rulz]

Yes but @bambuko specifically mentioned that he got it working with 0.19 ... I assume 0.19.1 since 0.19.2 was not released till them.

[sgrogan]

Yes but @bambuko specifically mentioned that he got it working with 0.19 ... I assume 0.19.1 since 0.19.2 was not released till them.

0.19.1 or 0.19.2 shouldn't make a difference (or any 0.20 dev version)
You need to install py_slvs python package so FreeCAD can find it.
See the installation instructions here: https://github.com/realthunder/FreeCAD_assembly3
specifically

For Windows, open a command prompt window, change directory to your FreeCAD installation directory, e.g. cd c:\Program Files\FreeCAD\bin. And install the solver by running command python.exe -m pip install py_slvs

If you still have problems, please specify the path to your FreeCAD installation. i.e. did you install for all users, single user, or portable version.

[bambuko]

Yes, it was 19.1 that I used.
It shouldn't make difference, but there was someone else reporting that what I did, didn't work for 19.2
I didn't need to install py_solvs python package to make it work, although there are confusing instructions about it and I tried it as well.

I have moved on since, and use either 20.0 version or Link branch - both work fine without any faffing around...

[pk_rulz]

Thank you for your reply bambuko.

However sgrogan's reply did it. Thank you sgrogan.
I somehow missed that it needed install of pyslvs separately in FreeCAD bin. Now works like a charm

Assembly 3 is really great to work with. Kudos to realthunder. Freecad has come closer to commercial variants with it and soon will be a formidable competitor.

[canarygsr]

I was having a similar issue with debian
If I tried to install python3 -m pip install py_slvs
I would get
Requirement already satisfied: py_slvs in ~/.local/lib/python3.9/site-packages (1.0.5)

I then noticed that the readme had the file should be in
`/home/<your_user_name>/.FreeCAD/Mod`

turns out it was installing py_slvs to ~/home/.local so I just copied it to .FreeCad/Mod