I'm in the same quandary: Data.Binary from the binary package has no error handling Data.Serialize from the cereal package uses only strict ByteString I was going to add error handling to Binary as a weekend project (it isn't that hard), but when I contacted the developers of binary, I was pointed at cereal. But as my project can parse multi-megabyte objects off the wire, I really want lazy ByteString support. I understand from the cereal creators that lazy ByteStrings are not in the future of cereal, since they got a big speed boost by going to strict ByteStrings only. I understand that Bryan O'Sullivan might have done work on adding errors to Binary... Bryan? If that's available, can we get it? If not, shall I do the work to add error handling? It's a long weekend... I've got time! - Mark Mark Lentczner http://www.ozonehouse.com/mark/ mark@glyphic.com