mp4creator hinting error

[neo75903]

whenever i hint a track with mp4creator version 1.1 it always displays the following error:

MP4ERROR: MP4File::FindIntegerProperty: no such property - moov.trak[0].mdia.minf.stbl.stsd.*.sinf.frma.data-format

Any idea where this error comes from.
The file seems to play ok.