Click above to get retro games delivered to your door ever month!

                              DOS Error Codes

        Of the following error codes, only error codes 1-12 are
        returned in AX upon exit from interrupt 21 or 24;  The rest
        are obtained by issuing the "get extended error" function
        call;  see INT 21,59

        01  Invalid function number
        02  File not found
        03  Path not found
        04  Too many open files (no handles left)
        05  Access denied
        06  Invalid handle
        07  Memory control blocks destroyed
        08  Insufficient memory
        09  Invalid memory block address
        0A  Invalid environment
        0B  Invalid format
        0C  Invalid access mode (open mode is invalid)
        0D  Invalid data
        0E  Reserved
        0F  Invalid drive specified
        10  Attempt to remove current directory
        11  Not same device
        12  No more files
        13  Attempt to write on a write-protected diskette
        14  Unknown unit
        15  Drive not ready
        16  Unknown command
        17  CRC error
        18  Bad request structure length
        19  Seek error
        1A  Unknown media type
        1B  Sector not found
        1C  Printer out of paper
        1D  Write fault
        1E  Read fault
        1F  General failure
        20  Sharing violation
        21  Lock violation
        22  Invalid disk change
        23  FCB unavailable
        24  Sharing buffer overflow
        25  Reserved
        26  Unable to complete file operation (DOS 4.x)
        27-31 Reserved
        32  Network request not supported
        33  Remote computer not listening
        34  Duplicate name on network
        35  Network name not found
        36  Network busy
        37  Network device no longer exists
        38  NetBIOS command limit exceeded
        39  Network adapter error
        3A  Incorrect network response
        3B  Unexpected network error
        3C  Incompatible remote adapter
        3D  Print queue full
        3E  No space for print file
        3F  Print file deleted
        40  Network name deleted
        41  Access denied
        42  Network device type incorrect
        43  Network name not found
        44  Network name limit exceeded
        45  NetBIOS session limit exceeded
        46  Temporarily paused
        47  Network request not accepted
        48  Print or disk redirection is paused
        49-4F Reserved
        50  File already exists
        51  Reserved
        52  Cannot make directory entry
        53  Fail on INT 24
        54  Too many redirections
        55  Duplicate redirection
        56  Invalid password
        57  Invalid parameter
        58  Network device fault
        59  Function not supported by network (DOS 4.x)
        5A  Required system component not installed (DOS 4.x)


                           DOS Error Code/Classes

      Error Classes

        01  Out of resource, out of space, channel, etc
        02  Temporary situation, not an error, ex: file lock
        03  Authorization, permission denied
        04  Internal, system detected internal error
        05  Hardware failure, serious problem related to hardware
        06  System failure, ex: invalid configuration
        07  Application error, inconsistent request
        08  Not found, file/item not found
        09  Bad format, file/item in invalid format
        0A  Locked, file/item interlocked
        0B  Media failure, ECC/CRC error, wrong or bad disk
        0C  Already exists, collision with existing item
        0D  Unknown, classification doesn't exist or is inappropriate


                   DOS Error Code/Action Codes and Locus

      Error Action Codes  (in BL)

        01  retry, attempt a few more times and re-prompt
        02  delay retry, retry a few more times after a pause
        03  re-enter input, prompt user to re-enter input
        04  abort with cleanup, orderly abort and shutdown
        05  immediate abort, exit immediately without cleanup
        06  ignore error
        07  user intervention, retry after user fixes the problem

      Error Locus (in CH)

        01  unknown
        02  block device
        03  network
        04  serial device
        05  memory