0x00000221

ERROR_INVALID_PORT_ATTRIBUTES

Invalid Object Attributes specified to NtCreatePort or invalid Port Attributes specified to NtConnectPort

win32decimal 545

Matched as: the code as given (hex)

Log a case with no specific solution

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Source: System Error Codes (500-999) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09