qnx4 cd-rom not working

Hi ng,

installed a cd-rom to our qnx 4.25 system, as master on ide 2nd channel.
See it in /dev, Iso9660fsys ist started.
But when I try to look an a cd I receive: “Can’t get free buffers for
deblocking” four times.

What goes wrong?

TIA

Friedhelm Schuetz
H.Kleinknecht & Co. GmbH