# is the stamp older than an hour ?
# in minutes
GRACE=60
-is_old=$(find $RUNNING_FILE -mmin +$GRACE)
+is_old=$(find $RUNNING_FILE -mmin +$GRACE 2> /dev/null)
if [ -n "$is_old" ] ; then
msg "$RUNNING_FILE is older than $GRACE minutes - removing"
rm -f $RUNNING_FILE