I have a question concerning a BOM that has a part that was part of an ECN that was processed and released, yet when we went to export the BOM out of PDM it shows as superseded and the last revision.  Can someone tell me why this happens?  This is not the first time we have had this happen on a BOM, and have had to have write another ECN to correct this which is causing problems with our vendors.

Thanks,

Sue