rsync problem

[redlotus72]

Hi,

My rsync is stopped working suddenly I got following in verbose and 
log,


mkstemp  failed: No such file or directory
and 
rsync error: received SIGUSR1 or SIGINT (code 20) at rsync.c(229)

my rsync code :

rsync -az -e ssh --delete $HOSTTOBACKUP:$SOURCE 
$DR_BACKUP_DIR/daily.0 >$tempfile 2>&1

the same code was working last week, what will be the problem,  how 
to proceed to fix? Any one faced same kind of problems?