In several runs of p_ret_01 in abc60 I see this error in the logs. Since there is (and can be) no abc01 record with the key of 000000000, this is a mistake. You can just ignore it (since it's just one...In several runs of p_ret_01 in abc60 I see this error in the logs. Since there is (and can be) no abc01 record with the key of 000000000, this is a mistake. You can just ignore it (since it's just one record), or you could run p_ret_01 in abc60 to locate the record with this particular LKR field. If the record is not deleted, you could try to find the bib record it is *supposed* to be connected to.