Error Codes
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                        Version 2 File Function Errors                        

  1     01h     Invalid function number
  2     02h     File not found
  3     03h     Path not found
  4     04h     No handles available
  5     05h     Access denied
  6     06h     Invalid handle
  7     07h     Memory control blocks destroyed
  8     08h     Insufficient memory
  9     09h     Invalid memory control block
 10     0Ah     Invalid environment
 11     0Bh     Invalid format
 12     0Ch     Invalid access code
 13     0Dh     Invalid data
 14     0Eh     Reserved
 15     0Fh     Invalid Disk Drive
 16     10h     Attempt to remove current directory
 17     11h     Not same device
 18     12h     No more files

                      Mappings to critical error handler                      

 19     13h     Disk write-protected
 20     14h     Unknown disk unit
 21     15h     Drive not ready
 22     16h     Unknown command
 23     17h     Data error (CRC)
 24     18h     Bad request structure length
 25     19h     Seek error
 26     1Ah     Unknown media type
 27     1Bh     Sector not found
 28     1Ch     Printer out of paper
 29     1Dh     Write fault
 30     1Eh     Read fault
 31     1Fh     General failure

                       Version 3 additional error codes                       

 32     20h     Sharing violation
 33     21h     Lock violation
 34     22h     Invalid disk change
 35     23h     FCB unavailable
 36     24h     Sharing buffer overflow
 37     25h     Code page mismatched
 38     26h     Unable to complete file operation (V4 only)
 39     27h     Handle disk full
 40-49  28-31h  Reserved
 50     32h     Network request not supported
 51     33h     Remote computer not listening
 52     34h     Duplicate name on network
 53     35h     Network name not found
 54     36h     Network busy
 55     37h     Network device no longer exists
 56     38h     Network BIOS command limit exceeded
 57     39h     Network adaptor hardware error

 58     3Ah     Incorrect response from network
 59     3Bh     Unexpected network error
 60     3Ch     Incompatible remote adaptor
 61     3Dh     Print queue full
 62     3Eh     Print queue not full
 63     3Fh     Print file deleted (not enough space)
 64     40h     Network name deleted
 65     41h     Access denied
 66     42h     Network device type incorrect
 67     43h     Network name not found
 68     44h     Network name limit exceeded
 69     45h     Network BIOS session limit exceeded
 70     46h     Temporarily paused
 71     47h     Network request not accepted
 72     48h     Print or disk redirection paused
 73-79  49-4Fh  Reserved
 80     50h     File already exists
 81     51h     Reserved
 82     52h     Cannot make directory entry

 83     53h     Failure on INT 24H
 84     54h     Too many redirections
 85     55h     Duplicate redirection
 86     56h     Invalid password
 87     57h     Invalid parameter
 88     58h     Network device fault

                       Version 4 additional error codes                       

 89     59h     Function not supported by network
 90     5Ah     Required system component not installed

                (plus error code 38 {26h} described earlier)

 
                                Error Classes:                                

 1      01h     Out of resource (storage space or I/O channels)
 2      02h     Temporary situation (file or record lock)
 3      03h     Authorization (denied access)
 4      04h     Internal (system software bug)
 5      05h     Hardware failure
 6      06h     System failure (configuration file missing or incorrect)
 7      07h     Application program error
 8      08h     Not found
 9      09h     Bad format
 10     0Ah     Locked
 11     0Bh     Media error
 12     0Ch     Already exists
 13     0Dh     Unknown

                              Suggested Action:                               

 1      01h     Retry
 2      02h     Delayed retry
 3      03h     Prompt user to reenter input
 4      04h     Abort after cleanup
 5      05h     Immediate abort
 6      06h     Ignore
 7      07h     Retry after user intervention

                                 Error Locus:                                 

 1      01h     Unknown or not appropriate
 2      02h     Block device (disk error)
 3      03h     Network related
 4      04h     Serial device (timeout)
 5      05h     Memory related


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