Hi Chris, I had not heard of the topological naming issue, but I have done some research and yes it sounds like that is the problem. Looking at the Dependency graph, both Sketch and Sketch001 have arrows to the XY_Plane, does that not mean they are attached?. I have tried Part Design > Map sketch to...

OS: Linux Mint 19 Tara Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.18.13959 (Git) AppImage Build type: None Branch: master Hash: 2f18182b6dff87f8857787c854e39ca4d441f993 Python version: 2.7.6 Qt version: 4.8.6 Coin version: 4.0.0a OCC version: 7.2.0 Locale: English/UnitedKingdom ...

OS: Linux Mint 19 Tara Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.18.13959 (Git) AppImage Build type: None Branch: master Hash: 2f18182b6dff87f8857787c854e39ca4d441f993 Python version: 2.7.6 Qt version: 4.8.6 Coin version: 4.0.0a OCC version: 7.2.0 Locale: English/UnitedKingdom ...

Thanks Chris,
Yes you are right, I will spend some time reading through the manuals
Mick

Hi Gene, I've done a bit more investigation, started from scratch with a new file and it worked fine. I don't understand what went wrong the first time. When you say select the correct post processor, the only one checked in preferences is grbl, but the problem file generates centroid. Is there an o...

I have just opened a drawing that worked previously, run simulation and post process and it generates the correct gcode.
Am I missing something here? Don't understand why my new one doesn't work. I have attached it.

OS: Linux Mint 19 Tara Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.18.13959 (Git) AppImage Build type: None Branch: master Hash: 2f18182b6dff87f8857787c854e39ca4d441f993 Python version: 2.7.6 Qt version: 4.8.6 Coin version: 4.0.0a OCC version: 7.2.0 Locale: English/UnitedKingdom ...

A couple of questions re co-ordinates 1) Is there any easy way to determine the co-ordinates of a point? I know I can go back to however the drawing was created, examine sketches, positioning, etc, but it seems like a pretty basic requirement to click on a corner and be able to see the x,y,z co-ordi...

Great news, thank you

Thanks for that. I have fixed it, for anyone with the same problem here is what I did - downloaded from https://pkgs.org/download/libexpat1 Ubuntu 16.04 versions libexpat1_2.1.0-7ubuntu0.16.04.3_i386.deb libexpat1_2.1.0-7ubuntu0.16.04.3_amd64.deb cd Download sudo dpkg -i libexpat1_2.1.0-7ubuntu0.16....