There is a check box under event on the properties tab called pack linked resource. When I check that box and do a save as package the pdf file I have linked is save in the packaged document. If I go back and uncheck that box and change the linked pdf and do a save as package it will retain the old link and I can not seem to get rid of the old link. What am I doing wrong?
Without seeing your scene, I can only speculate, but here goes:
If this is for View mode, after you change the event, you need to 'update nuetral properties' or 'update views with selected object.' Saving the file won't preserve the change otherwise.