If you have more information to improve this document, let me know !

How to decipher LibreOffice error codes

Unfortunately the LibreOffice error codes is a combination of project area, error class and error code. The combination of these three provides some indication of what the cause is, although in most cases this is not conclusive.

The authoritative source for ErrCodes are the following files:

List of ErrCode classifications
List of other related ErrCode classifications 
01234567012345670123456701234567
||   ||          |||   ||      |
Warning           ||   ||      |
 |   ||           ||   ||      |
 Dynamic          ||   ||      |
      |           ||   ||      |
      Subsystemarea|   ||      |
                   |   ||      |
                   |   ||      |
                   |   ||      |
                   Class|      |
                        |      |
                        |      |
                        |      |
                        Code

UnoException ErrCode

283

Binary: 000:00001:00011011

Area: 0 (ERRCODE_AREA_TOOLS)
Class: 1 (ERRCODE_CLASS_ABORT)
Code: 27 (ERRCODE_IO_ABORT)

1287

Binary: 000:00101:00000111

Area: 0 (ERRCODE_AREA_TOOLS)
Class: 5 (ERRCODE_CLASS_ACCESS)
Code: 7 (ERRCODE_IO_ACCESSDENIED)

2074

Binary: 000:01000:00011010

Area: 0 (ERRCODE_AREA_TOOLS)
Class: 8 (ERRCODE_CLASS_PARAMETER)
Code: 26 (ERRCODE_IO_INVALIDPARAMETER)

3088

Binary: 000:01100:00010000

Area: 0 (ERRCODE_AREA_TOOLS)
Class: 12 (ERRCODE_CLASS_WRITE)
Code: 16 (ERRCODE_IO_CANTWRITE)

19468 — ERRCODE_SFX_DOCUMENTREADONLY

Binary: 010:01100:00001100

Area: 2 (ERRCODE_AREA_SFX)
Class: 12 (ERRCODE_CLASS_WRITE)
Code: 12 (ERRCODE_IO_NOTSUPPORTED)