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When I use the following command, that is Legal size (8.5 X 14)
scanimage --source ADF --mode Gray --format=pdf -l 0 -t 0 -x 216 -y 356
--resolution 150 > image.pdf

It show me this error output:

[hp5590] Top Y (0) + pixels Y (2102) exceedes max Y 1758
scanimage: sane_start: Invalid argument

I use xsane as frontend:
sane                        1.0.14-9
libsane                     1.0.20-13ubuntu2
xsane                       0.996-2ubuntu3

Ubunt Hardy Heron 8.04

I Have the debug log too.

Thanks in advance.