There isn't enough information in your request to know what the answer might be. Are you using a Central Library in the Expedition flow? In which case Library Services in Library Manager might help, or for soemthing not covered in the tool set the Advanced Library Editor (ALE) might help, you can download this from here http://communities.mentor.com/docs/DOC-2604
If using PADS or a third party flow then you will need to provide more details about the problem. What has changed and where it is causing issues?