Hi Erik,

It looks like the data is considered empty. I suspect that encoded string is some sort of header for decompressing later.

One thing you could try is setting the verbose level fairly high for the write operation (like even 4 or 5).

Does everything seem to be correctly written besides the data? If so, what does "gifti_tool -test" say about the file?

Feel free to mail me such a file, or the verbose output.

- rick