Returned are the messages:
1372.47 <App> Document.cpp(3151): The graph must be a DAG.
1372.52 <App> Document.cpp(3504): Unbenannt#Sketch still touched after recompute
Oh ya! You can mess up a model so very quickly using this. I should write in bold. Development only
on every page. To use this you really need to have a good handle on FreeCAD basic structure.
Step #1, is the target Plane/Datum/LCS, I wrote it this way so the user knows that those are the only things that should be selected. You select the reference in the tree and click the button, you will see the button text populate. Let's say it states XY_plane.
Select a sketch and click Map to support
, your now finished with one mappping. If you go look at the sketch support you will see XY_Plane.
After this you you can do more by repeating step #2 but you also need to decided on what the goal is. If you mapping everything to the XY_Plane then you don't need to do step #1 again.