Gene,
Jon,

This useful ? In order from newest file to eldest...

Personally I don't see an error here but the command that
produced these (and other files) was

> amtape ninfo update
amtape: scanning all 9 slots in tape-changer rack:
slot 3: date X        label NTNWKLY10
Bus error (core dumped)


# cat amtape.20030404133143.debug 
amtape: debug 1 pid 20316 ruid 110 euid 110: start at Fri Apr  4 13:31:43 2003
changer: got exit: 0 str: 3 9 1 1
changer: got exit: 0 str: 3 /dev/rmt/0cn
changer_label: NTNWKLY10 for slot 3
changer: got exit: 0 str: 3 9 1 1
changer_query: changer return was 9 1 1
changer_query: searchable = 1
changer_label: calling changer -label NTNWKLY10
changer: got exit: 0 str: 3 /dev/rmt/0cn


# cat  chg-zd-mtx.20030404133149000.debug
chg-zd-mtx: debug 1 pid 20624 ruid 110 euid 110: start at Fri Apr  4 13:31:49 
2003
13:31:49 Arg info:
         $# = 2
         $0 = "/usr/local/libexec/chg-zd-mtx"
         $1 = "-label"
         $2 = "NTNWKLY10"
13:31:49 Running: /usr/local/sbin/mtx status
13:31:50 Exit code: 0
         Stdout:
  Storage Changer /dev/scsi/changer/c5t4d0:1 Drives, 9 Slots ( 0 Import/Export )
Data Transfer Element 0:Full (Storage Element 3 Loaded):VolumeTag = AF6411L1    
                    
      Storage Element 1:Full :VolumeTag=AF6410L1                        
      Storage Element 2:Full :VolumeTag=AF6402L1                        
      Storage Element 3:Empty:VolumeTag=                                
      Storage Element 4:Full :VolumeTag=AF6412L1                        
      Storage Element 5:Full :VolumeTag=AF6394L1                        
      Storage Element 6:Full :VolumeTag=CLNI55L1                        
      Storage Element 7:Full :VolumeTag=AF6396L1                        
      Storage Element 8:Full :VolumeTag=AF6398L1                        
      Storage Element 9:Full :VolumeTag=AF6397L1                        
13:31:50 Config info:
         firstslot = "1"
         lastslot = "9"
         cleanslot = "-1"
         cleancycle = "120"
         offline_before_unload = "0"
         unloadpause = "0"
         autoclean = "0"
         autocleancount = "99"
         havereader = "1"
         driveslot = "0"
         poll_drive_ready = "3"
         max_drive_wait = "120"
13:31:50 STATUS   -> currently loaded slot = 3
                  -> currently loaded barcode = "AF6411L1"
13:31:50 LABEL    -> Adding label "NTNWKLY10" with barcode "AF6411L1" for slot 
3 into /usr/local/etc/amanda/ninfo/chg-zd-mtx-barcodes
                  -> already synced
13:31:50 Exit (0) -> 3 /dev/rmt/0cn
chg-zd-mtx: pid 20714 finish time Fri Apr  4 13:31:50 2003

Then a new core file

# cat chg-zd-mtx.20030404133149.debug 
chg-zd-mtx: debug 1 pid 20526 ruid 110 euid 110: start at Fri Apr  4 13:31:49 
2003
13:31:49 Arg info:
         $# = 1
         $0 = "/usr/local/libexec/chg-zd-mtx"
         $1 = "-info"
13:31:49 Running: /usr/local/sbin/mtx status
13:31:49 Exit code: 0
         Stdout:
  Storage Changer /dev/scsi/changer/c5t4d0:1 Drives, 9 Slots ( 0 Import/Export )
Data Transfer Element 0:Full (Storage Element 3 Loaded):VolumeTag = AF6411L1    
                    
      Storage Element 1:Full :VolumeTag=AF6410L1                        
      Storage Element 2:Full :VolumeTag=AF6402L1                        
      Storage Element 3:Empty:VolumeTag=                                
      Storage Element 4:Full :VolumeTag=AF6412L1                        
      Storage Element 5:Full :VolumeTag=AF6394L1                        
      Storage Element 6:Full :VolumeTag=CLNI55L1                        
      Storage Element 7:Full :VolumeTag=AF6396L1                        
      Storage Element 8:Full :VolumeTag=AF6398L1                        
      Storage Element 9:Full :VolumeTag=AF6397L1                        
13:31:49 Config info:
         firstslot = "1"
         lastslot = "9"
         cleanslot = "-1"
         cleancycle = "120"
         offline_before_unload = "0"
         unloadpause = "0"
         autoclean = "0"
         autocleancount = "99"
         havereader = "1"
         driveslot = "0"
         poll_drive_ready = "3"
         max_drive_wait = "120"
13:31:49 STATUS   -> currently loaded slot = 3
                  -> currently loaded barcode = "AF6411L1"
13:31:49 INFO     -> first slot: 1
                  -> current slot: 3
                  -> loaded slot: 3
                  -> last slot: 9
                  -> slot list:  1 2 3 4 5 6 7 8 9
                  -> can go backwards: 1
                  -> havereader: 1
13:31:49 Exit (0) -> 3 9 1 1
chg-zd-mtx: pid 20614 finish time Fri Apr  4 13:31:49 2003