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Error Codes — Complete Reference
DOS Error Codes
Full reference in error_handling.md. Summary of the most commonly encountered:
| Code |
Constant |
Description |
| 103 |
ERROR_INSUFFICIENT_FREE_STORE |
Out of memory |
| 114 |
ERROR_BAD_TEMPLATE |
Command-line template parse error |
| 121 |
ERROR_FILE_NOT_OBJECT |
Not a valid executable |
| 202 |
ERROR_OBJECT_IN_USE |
File/dir locked by another process |
| 203 |
ERROR_OBJECT_EXISTS |
File already exists (can't create) |
| 204 |
ERROR_DIR_NOT_FOUND |
Directory path not found |
| 205 |
ERROR_OBJECT_NOT_FOUND |
File not found |
| 209 |
ERROR_ACTION_NOT_KNOWN |
Packet type not supported by handler |
| 210 |
ERROR_INVALID_COMPONENT_NAME |
Illegal character in filename |
| 212 |
ERROR_OBJECT_WRONG_TYPE |
e.g., tried to Enter a file |
| 213 |
ERROR_DISK_NOT_VALIDATED |
Disk not yet validated after insert |
| 214 |
ERROR_DISK_WRITE_PROTECTED |
Write-protected media |
| 216 |
ERROR_DIRECTORY_NOT_EMPTY |
Can't delete non-empty directory |
| 218 |
ERROR_DEVICE_NOT_MOUNTED |
Device/volume not mounted |
| 221 |
ERROR_DISK_FULL |
No free space |
| 222 |
ERROR_DELETE_PROTECTED |
File has delete protection |
| 223 |
ERROR_WRITE_PROTECTED |
File has write protection |
| 224 |
ERROR_READ_PROTECTED |
File has read protection |
| 225 |
ERROR_NOT_A_DOS_DISK |
Unrecognised disk format |
| 226 |
ERROR_NO_DISK |
No disk in drive |
| 232 |
ERROR_NO_MORE_ENTRIES |
End of directory scan (ExNext) |
| 233 |
ERROR_IS_SOFT_LINK |
Object is a soft link |
| 303 |
ERROR_BUFFER_OVERFLOW |
Buffer too small |
Exec Device Errors
Returned in io_Error field of IORequest:
| Code |
Constant |
Description |
| 0 |
— |
Success |
| -1 |
IOERR_OPENFAIL |
OpenDevice failed |
| -2 |
IOERR_ABORTED |
I/O request was AbortIO'd |
| -3 |
IOERR_NOCMD |
Command not supported by this device |
| -4 |
IOERR_BADLENGTH |
Invalid length parameter |
| -5 |
IOERR_BADADDRESS |
Invalid address parameter |
| -6 |
IOERR_UNITBUSY |
Unit is busy (exclusive access) |
| -7 |
IOERR_SELFTEST |
Hardware self-test failure |
Trackdisk / SCSI Errors
| Code |
Constant |
Description |
| 20 |
TDERR_NotSpecified |
General hardware error |
| 21 |
TDERR_NoSecHdr |
Sector header not found |
| 22 |
TDERR_BadSecPreamble |
Bad sector preamble |
| 23 |
TDERR_BadSecID |
Bad sector ID |
| 24 |
TDERR_BadHdrSum |
Header checksum error |
| 25 |
TDERR_BadSecSum |
Sector checksum error |
| 26 |
TDERR_TooFewSecs |
Too few sectors found |
| 27 |
TDERR_BadSecHdr |
Bad sector header |
| 28 |
TDERR_WriteProt |
Disk is write protected |
| 29 |
TDERR_DiskChanged |
Disk was changed |
| 30 |
TDERR_SeekError |
Seek error |
| 31 |
TDERR_NoMem |
Not enough memory |
| 32 |
TDERR_BadUnitNum |
Invalid unit number |
| 33 |
TDERR_BadDriveType |
Bad drive type |
| 34 |
TDERR_DriveInUse |
Drive in use |
| 35 |
TDERR_PostReset |
Post-reset error |
Intuition/Workbench Error Codes
| Value |
Meaning |
| 0 |
Success |
| 1 |
Not enough memory |
| 2 |
No chip memory |
| 3 |
No free store |
| 4 |
Screen too big |
| 5 |
No screen |
References
- NDK39:
dos/dos.h, exec/errors.h, devices/trackdisk.h
- See: error_handling.md — DOS error handling patterns