Hi code4libbers, I don't have much experience with MarcEdit, I'm hoping someone else does, especially with creating automated MarcEdit "tasks", and can advise: Would it be possible to create a MarcEdit task that: => IF there is 338 field with subfield $a "online resource", THEN erase all existing subfield $b's in that field, and add a single subfield $b "cr". We have records loaded from certain sources that have inconsistent 338$a and $b, where the $a is the reliable one. I'm curious if I can send records from these sources through a MarcEdit Task to correct this known pattern of error. Anyone know if this is possible in a MarcEdit task? And if you could supply some hints to a complete newbie to MarcEdit on how to do it, that would be quite kind of you! Jonathan