buffer writeraw fails

I have debugged my maxmsp 6.1.4 patch down to a failure in writeraw. I created a test case with nothing but a "buffer~ foo 20" and a couple of messages into it at the first port and still see the fail. The messages are "fill 0.55" and "writeraw". After filling, I can display correct data in the buffer, but if I click the writeraw message, I get "jsoundfile_writefloats: bogus format specified". If I do it a second time, maxmsp crashes. If I change the writeraw message to writeaiff or writewave, it works fine.

Agemoz