Thanks very much. It has worked very well. I have only one probleme. If the value or url1 does not exist in urllookup.csv i need to keep them in the result. I tried that: eval f1_url=if((isnull(val1_f1 ) AND isnull(val2_f1 ) and isnull(val1_f3)), url1, val1_f1 ." ".val2_f1 ." ".val1_f3) But only works ok of none of the urls in the multivalue fields exist in the lookup. If one or more exists, it returns the match of the urls which exists but not the others who does not exists in the lookup. Thanks very much for helping me. ... View more