using :new / :old values in a trigger (after inserting rows)

I am trying run an AFTER INSERT trigger that reads both :new and :old values corresponding to some of the columns of the record I am trying to insert. When
running, it returns the following error: ORA-04091. Following Oracle manuals, I
understood that I could read these values altough I cannot write to them as it
is an AFTER INSERT trigger. Thanks Received on Tue Jul 08 2003 - 05:18:53 CDT