0x000004B9
ERROR_INVALID_GROUPNAME
The format of the specified group name is invalid.
win32decimal 1209
Matched as: the code as given (hex)
Log a case with no specific solution
Source: System Error Codes (1000-1299) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09