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ERROR_SXS_MANIFEST_PARSE_ERROR
ERROR_SXS_MANIFEST_PARSE_ERROR means that the SxS loader found XML syntax errors in the manifest. The final process-start failure can be far from the actual cause, so the line and file reported by SideBySide tracing are more useful than the generic launch dialog.
How to investigate
- Run
sxstracearound the failing launch and use its parsed output to locate the manifest and reported line. - Validate the exact deployed XML, including quoted attributes, namespace declarations, and closing tags.
- Repair the first parser error before interpreting later errors because one malformed construct can cause a cascade of follow-up messages.
A manifest that is valid in a source repository can still fail after packaging if an installer, transform, or build step rewrote it.
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