2008.09.12 16:18 "Re: [Tiff] Get this error when recombining CMKY tiffs over 199DPI??", by Bob Friesenhahn
F:\>gm composite -compose CopyMagenta f:\temp\X4153326M00.TIF f:\temp\X4153326C00.TIF f:\temp\sam.tif gm composite: f:\temp\X4153326C00.TIF: Read error at scanline 852; got 3155 bytes, expected 3786. (TIFFFillStrip).
The Windows builds of GraphicsMagick are still using libtiff 3.8.2. Perhaps this bug has been fixed in later beta/alpha versions of libtiff. It seems familiar.
Another thing to be aware of is that GraphicsMagick does not support I/O to large files under Windows although it is able to handle large images internally. The file size limit is likely 2GB.
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/