I have created a 4 walls building but each time I try to add a window or a door
Freecad get totally wrong and nothing is working since then

I tried with BIM and Arch WB with the same result
I am using Freecad 64 bits for windows

Any clue ?

After updating to version 0.18.4 everything is working fine now

Thks a lot for your great help !

Pls find below my Freecad version infos: OS: Windows 7 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.18.16117 (Git) Build type: Release Branch: releases/FreeCAD-0-18 Hash: dbb4cc6415bac848a294f03b80f65e888d531742 Python version: 3.6.6 Qt version: 5.6.2 Coin version: 4.0.0a OCC vers...

I only 2 points :

If you want effective help, you have to:
1) you need to post your full FC info
2) attach a FC logfile to your post

where are 3 & 4 ?

What would you like as full FC info ?
I have already posted the report view
what else do you need ?

I have downloaded Python v3.8 (64 bit) but
the Python Console in Freecad is still refering to Python v3.6.6

How can I implement the new Python version in Freecad ?

Can someone help me with this issue ?

Just after start I've got this: Please look into the log file for further information During initialization the error invalid syntax (dimensioning.py, line 53) occurred in C:\Users\vosec\AppData\Roaming\FreeCAD\Macro\Mod\FreeCAD_drawing_dimensioning-d73728a75b595e3a40e749ca1d939e218d14b11d\InitGui.p...

How can I see the report panel ?

I have already several times removed and re-installed the workbench using
the addon tool without any success !