How to redefine offset lines?

Hello @MB_10357724,

Welcome to the PTC Community!

Thank you for your question. 

I’d like to recommend to bring more details and context to your initial inquiry. 
It also helps to have screenshot(s) to better understand what you are trying to do in your process. 

This will increase your chances to receive meaningful help from other Community members. 

Thanks,
Vivek N
Community Moderation Team.

First, the moderator is right to ask for more information. I am making an assumption about the issue you are facing.

AFAIK You must remove and recreate any offset line that has lost references. This has been an issue for a long time. Look for an enhancement request and vote for it if you find one in the community.

It is possible that an enhancement has been deployed in Creo 10 or 11 as I am not working with those yet. If anyone knows for sure chime in.

Well, how did you replace the component ?

Assuming you deleted a component and brought in its replacement - then now you can only delete the broken offset line and create a new one...

Next time, try using the "replace with unrelated + Edit Ref Table" method - then the offset line will (probably) be preserved.