Some components missing in copy from another model

Tekla Structures
Not version-specific
Tekla Structures
Environment
Not environment-specific
Question:
When I use copy from another model command, some components are missing. Why?

Answer:
It might happen because you have components connected to parts created by another component, such as for example detail component attached to stringers created by Stairs(S71) component. In this case you need to explode the Stairs(S71) component and re-apply the detail components, in order to get the detail components included in copy.

See also
Importing steel model into a concrete model
Missing components 
Czy to było pomocne?