DOS Error 1       Invalid function number
 DOS Error 2       File not found
 DOS Error 3       Path not found
 DOS Error 4       Too many open files (no handles left)
 DOS Error 5       Access denied
 DOS Error 6       Invalid handle
 DOS Error 7       Memory control blocks destroyed
 DOS Error 8       Insufficient memory
 DOS Error 9       Invalid memory block address
 DOS Error 10      Invalid environment
 DOS Error 11      Invalid format
 DOS Error 12      Invalid access code
 DOS Error 13      Invalid data
 DOS Error 14      Reserved
 DOS Error 15      Invalid Drive was specified
 DOS Error 16      Attempt to remove current directory
 DOS Error 17      Not same device
 DOS Error 18      No more files
 DOS Error 19      Attempt to write on write-protected diskette
 DOS Error 20      Unknown unit
 DOS Error 21      Drive not ready
 DOS Error 22      Unknown command
 DOS Error 23      Data error (CRC)
 DOS Error 24      Bad request structure length
 DOS Error 25      Seek error
 DOS Error 26      Unknown media type
 DOS Error 27      Sector not found
 DOS Error 28      Printer out of paper
 DOS Error 29      Write fault
 DOS Error 30      Read fault
 DOS Error 31      General failure
 DOS Error 32      Sharing violation
 DOS Error 33      Lock violation
 DOS Error 34      Invalid disk change
 DOS Error 35      FCB unavailable
 DOS Error 36-79   Reserved
 DOS Error 80      File exists
 DOS Error 81      Reserved
 DOS Error 82      Cannot make
 DOS Error 83      Fail on INT 24