t/Test.pm and t/RemoteBlast.t use the qr// operator, which isn't in 5.4. I think it came in with 5.5. Are we still remaining 5.4 compatible? It's OK if we aren't -- I'd quite like to force the Sanger Centre to upgrade to 5.6. Our 5.004_04 is rather long in the tooth! James James G.R. Gilbert The Sanger Centre Wellcome Trust Genome Campus Hinxton Cambridge Tel: 01223 494906 CB10 1SA Fax: 01223 494919