when i write the following two statements :
cp /dev/NULL /clocal/mqbrkrs/user/mqsiadm/sanjay/dspmq_temp
cat /dev/NULL > /clocal/mqbrkrs/user/mqsiadm/sanjay/dspmq_temp

its gives me errors like :
cp: /dev/NULL: A file or directory in the path name does not exist.
cat : /dev/NULL can't open the file.

I am using AIX 5.0,
Tell me if you have any answers or clue to solve this.

Is there any other way to make a file clear or make its size of 0 bytes?
ASAP.

Thanks.