Hi Mare,

=IF(ISERROR(VLOOKUP(B10,ArtA!A2:C55000
ArtB!A2:C49424,3,FALSE)),VLOOKUP(B10,ArtA!A2:C5500 0,3,FALSE),VLOOKUP(B10,ArtB!A2:C49424,3,FALSE))

Make that:

=IF(ISERROR(VLOOKUP(B10,ArtA!A2:C55000,3,FALSE)),V LOOKUP(B10,ArtA!A2:C55000,3,FALSE),VLOOKUP(B10,Ar
tB!A2:C49424,3,FALSE))

Regards,

Jan Karel Pieterse
Excel MVP
http://www.jkp-ads.com