i.rectify of grass5.0beta2 on RH6.0

GRASS GRASS user
1

hi,
The command i.rectify and i.rectify2 of grass5.0beta2 on RH6.0 can't
produce any result raster, and it hasn't any error, it just run over.

Thank you for your help.
Der-Johng Sun
djsun@gate.sinica.edu.tw