Error Code Portal
MicrosoftWindows Installer messagesError code

2721

MSI message 2721: Custom action [2] not found in Binary table stream.

Alternative forms: 0x00000AA1 · 0xAA1

What does this code mean?

Code 2721 · An issue reported by Windows Installer messages.

Official explanation · Original text

Custom action [2] not found in Binary table stream.

Troubleshooting and diagnostic links

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

Source and terms of use

Windows Installer Error Messages (for Developers) ↗

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