HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                               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

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