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ERROR_INSTALL_PACKAGE_OPEN_FAILED
ERROR_INSTALL_PACKAGE_OPEN_FAILED means that Windows Installer could not open the requested package. The cause can be a missing source, inaccessible location, or a file that is not usable as the intended MSI package.
Test the exact path from the installer service context and verify that the file is the intended package, not an HTML download, partial copy, or inaccessible network artifact. Preserve the original file before replacing it.
What to check
- Verify the exact path, file availability, and read access in the security context that starts the installer.
- For a deployment share or downloaded package, confirm the content was fully obtained before launching it.
- Keep the package version and its source URL or distribution path in the installer log for repeatable diagnosis.
Microsoft: Windows Installer error codes · Microsoft: MsiOpenPackageEx
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