Civil 3D upgrade. Native subassembly property GetValueFrom issues.

So you have some complex assemblies made of native Civil 3D subassemblies.

You upgrade to a newer version.

You use the same assemblies to a new dwg or even you just open an existing dwg with the new version.

Everything works fine.

BUT...you have to make a change. Make subassemblies property changes to GetValueFrom eg Slope from a previous one. You select the value to override with. Check is automatically assigned.

But no changes take place at the drawing. You look again and the value is not assigned! Yes, Civil 3D fooled you.

The only way to achieve this change is to use a current version of the native Civil 3D subassembly for the one to GetValueFrom . Then the following, previous version, subassemblies can actually GetValueFrom.