I create my piece in an assembly so that I have something robust at the end.
Then I want to import all of these parts into a second kinematic assembly.
I do this thanks to the "store as" tool, only some part during the import loses their "marker", and finally a window named "Update Summary" shows me the different errors made following the import.
My method must be bad.
And I don't know how to keep a robust set under this software.