Hello,
yesterday was the first time I detected it:
Have a layout-file and derive geometry and a sketch into a part file.
So far everything works fine.
Later I came back to the already finished file and wanted to change the holes that were controlled by the sketch and:
All the references to the layout file got lost. Every piece of geometry in the sketch is no more constrained.
In the derive-dialog box everything is fine. Even if I rename the scetch in the layout-file it is renamed in the part-file. But I cannot replace it. Cannot delete it without loosing lots of hours.
This is not only in one file. I detected the same thing in lots of files. A desaster! Do not know when it started an no idea which event started this.
Any suggestions?