Changing service via the drop down only works between specs that have
identical templates. Geometry changes are
not allowed. This isn't very useful barring changing supply to return for example, if and only if their templates are identical.
This does however provide a round about way to change a service name, since
changing a service's name in the DB directly will bracket the service and orphan the parts. For example we can copy a service, change the copy's name, then use the drop down to switch to the copied, renamed service. The services are still "identical".
The only Autodesk supported way to make
geometry modifying service changes is to use the Change Service tool via the Modify Tab. This will completely replace all parts with new parts, providing wildly undesirable results, wiping out any data, custom dimensions, data, tags and numbers that existed on the previous parts.
In many cases where a service change seems required, what we are really after is a specification, and/or a material change. With
Virtual Mechanical, we can do both. Check out this
YouTube video covering the VM Fab Properties Palette, including making specification, material, and service changes.
