database not shutting and rman script is continuing.

 I have a cold backup script.  It has been working fine until recently until now.  I ahve included the portion of the script where there is the problem .  The script shuts down the database and then puts in in mount mode.  It appears that the script continues through the script without waiting for the database to shut down.  Is there a way to ensure that the database actually shuts down before continuing?

I want the script to wait until the database is down prior to continuing executing the script..  The problem is that it is impacting my archivelogs, which then becoem unavailble when I try to rerun the job.