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ERROR_MRM_TOO_MANY_RESOURCES
ERROR_MRM_TOO_MANY_RESOURCES means the resource indexer or runtime reached a supported resource-count limit for the package or operation.
Measure which resource source or generation step contributes most entries before splitting the index. Removing duplicate or generated resources at build time is preferable to arbitrary runtime changes when a supported count limit is reached.
What to check
- Inspect the resource-index build log and PRI dump to identify unexpectedly duplicated or generated resources.
- Remove redundant variants and split resource content only when the package design supports that layout.
- Check custom build tooling for accidental indexing of build artifacts or duplicate folders.
Microsoft: Resource Management System and PRI files
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