Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!hellgate.utah.edu!peruvian.utah.edu!u-sgreen
From: u-sgreen%peruvian.utah.edu@cs.utah.edu (Scott Greenman)
Newsgroups: comp.sys.next
Subject: Writing NXImage data to a stream
Keywords: NXImage NXStream Sybase
Message-ID: <1991Mar22.110636.15387@hellgate.utah.edu>
Date: 22 Mar 91 18:06:36 GMT
Organization: University of Utah CS Dept
Lines: 19

I am trying to write an image stored in a NXImage object to a stream, save
that data in Sybase, write it back out into another stream, and read it back
into an NXImage object.  I am using the writeTiff: method to write the image
to the stream.  I have verified that the data goes into and out of Sybase
okay, but then when I try to use NXImage's initFromStream: to read it back
into a NXImage I get the error:

     TIFF Error: TIFF directory is missing required "ImageLength" field.

How can I get around this?  Do I need to use a typed stream and archive the
entire NXImage object?  I'm not very farmilliar with typed streams so I don't
know if they will work.

Thanks for any help.

Please respond by e-mail and I will post a summary.

Scott Greenman
Univ of Utah