problem with crontab

hi all
does any on has explanation for this result

bash-3.00$ crontab -e
"/var/tmp/Ex1kayUW" No space left on device
The crontab file was not changed.
bash-3.00$

It looks like your File system is full so the temporary file to edit your crontab cannot be created

cd /var/tmp
df -k .

I suppose it is 100% full

Probably what the first response line says: the mount point that /var/tmp resides on is full (either no data space left or no inodes left). Can you post the output of df -i /var/tmp and df -k /var/tmp