Error Code Portal
MicrosoftWindows Win32Error code

546

ERROR_PORT_MESSAGE_TOO_LONG

Alternative forms: 0x00000222 · 0x222 · ERROR_PORT_MESSAGE_TOO_LONG · 0x80070222

What does this code mean?

Code 546 · An issue reported by Windows Win32.

Official explanation · Original text

Length of message passed to NtRequestPort or NtRequestWaitReplyPort was longer than the maximum message allowed by the port.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

System Error Codes (500-999) (WinError.h) ↗

Creator: Microsoft and MicrosoftDocs contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Extracted numeric codes, symbolic names and English message text; converted Markdown/HTML to plain text and normalized whitespace; added Korean product context, namespace labels, status classification and separately labeled official links. No machine translation of message text.

Source details · Original licenses and notices