i.rectify.block

I tried to apply i.rectify.block to a scanned aerial photograph (300 dpi,
7 Mb), but in the final phase of this procedure - the rectification itself -
something must have gone wrong. The resulting image covers only half of the
original (the top half). Does anyone know how this may be caused and
what I can do to avoid it?
Please reply to: BIESBOS@METEOOR.FRW.UVA.NL

Kees van Loo
Bank Erosion Project - Dept. of Physical Geography, University of Amsterdam