DBSpace has Status NP after restore, Why?

Hi, For the first time I tried to restore a dbspace from tape using the ontape -r -D option. After the restore, onmonitor shows a status ofNP after the dbspace. I am unable to find information about this status in the adminstrator's guide. How do I make this dbspace active? When trying to access a table from this dbspace I get a "Primary and Mirror Chunks are bad" error. I would be surprised if there is a problem with the tape or tape device in the backup or restore since DLTs are very reliable. Thank you, Steven Kurlander