Cat_import command but no catalog was imported

Dear All,

I have Netbackup 7.6 master server installed in Windows server 2008 R2. I wants to restore from a expired image backup in tape, the problem is i dont even know in which media id the backup images is stored. So i have to restore catalog file which the image backup wasn't expired yet.

So i restore the catalog file, move it to db.export folder then execute cat_import -client client_name. But the command say

 cat_import : no images found.

Best regards,

Iqbal