Hi Michael, Is this product a flow meter? It the product located in a harsh environment? Are there any "hooks" into this device that the customer has access to that could allow writing to the flash area? Has the code been scrutinized/analyzed heavily for possible weak areas? Regards, Ken Pergola -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body