I am trying my first ontape restore (no emergency just learning).

Steps:
level 0 ontape -s
dropped my database and dbspace that the database was on
Set the tape to /dev/null and used ontape -s
Set the tape back to /dev/rmt/0
ontape -r but it said the dbspace did not exist.  I recreated the
dbspace with the exact same size as before.

ontape -r -D cdi
Archive Tape Information

Tape type:      Archive Backup Tape
Online version: IBM Informix Dynamic Server Version 9.40.UC7
Archive date:   Thu Apr 27 07:30:18 2006
User id:        root
Terminal id:    /dev/pts/1
Archive level:  0
Tape device:    /dev/rmt/0
Tape blocksize (in k): 512
Tape size (in k): 500000000
Tape number in series: 1
Continue restore? (y/n)y

Spaces to restore:1 [cdi
                                                                   ]
Physical restore failed - Archived 'cdi' is a different space from the
        current 'cdi'.  Only physical restores of
        existing spaces are allowed.

onstat -d:
address  number   flags      fchunk   nchunks  flags    owner    name
8a1127e8 1        0x20001    1        1        N        informix
rootdbs
8ad0be60 2        0x42001    2        1        N TB     informix dbtmp
8ad0c018 3        0x1           3        1        N        informix
dbplog
8ad0c178 4        0x40001    4        1        N  B     informix dblogs
8ad0c2d8 5        0x60005    5        1        ND B     informix cdi
5 active, 2047 maximum

Chunks
address  chunk/dbs  offset     size       free       bpages     flags
pathname
8a112948 1     1    0          250000     247308                PO--
/dev/informix/rootdb
8ad0b840 2     2    0          7500000    7499947               PO-B
/dev/informix/dbtmp
8ad0b9c8 3     3    0          500000     199947                PO--
/dev/informix/dbplog
8ad0bb50 4     4    0          4000000    2997447               PO-B
/dev/informix/dblogs
8ad0bcd8 5     5    0          200000000  0                     PD-B
/dev/informix/cdi
5 active, 32766 maximum

Expanded chunk capacity mode: enabled

What am I doing wrong?
Thanks
Gary Quiring