Sometimes while working on a project if any DGN file has some components which do not belong to the active dataset of the project, you will be not able to use some tools for those components such as:
To use these tools you need to replace those components with components from the active dataset.
Bentley Raceway and Cable Management has a tool ‘Validate Active Dataset’ which will check if any components do not belong to the active dataset.
If above problem still persists, then please create a Service Request and contact the Bentley Product Advantage group. Please include a list of all relevant details to get in depth analysis for a solution or workaround.