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ERROR_MRM_FILEPATH_TOO_LONG
ERROR_MRM_FILEPATH_TOO_LONG means a path used while indexing or loading a resource exceeds the supported length for that resource-management operation.
What to check for ERROR_MRM_FILEPATH_TOO_LONG
- Shorten the project-root path, generated-output path, or deeply nested resource folder names.
- Check both the source path and the package-relative path generated by the build.
- Rebuild the PRI after correcting paths; do not truncate names in the packaged output manually.
Microsoft: Resource Management System and PRI files
Microsoft: MakePri.exe command-line options
Microsoft: MakePri.exe configuration file
Where ERROR_MRM_FILEPATH_TOO_LONG is returned
ERROR_MRM_FILEPATH_TOO_LONG is Win32 system error 15121 (0x00003B11) from winerror.h. AllStat describes it as “Filepath too long.”. For ERROR_MRM_FILEPATH_TOO_LONG, the code is useful only together with the API that failed, because multiple Windows components can reuse system-error values while imposing different retry and cleanup rules.
Diagnostic sequence for ERROR_MRM_FILEPATH_TOO_LONG
- Call GetLastError immediately after the failing API and save ERROR_MRM_FILEPATH_TOO_LONG, the function name, all relevant flags, and the target path, handle, service, device, account, or policy object.
- Capture the component log that owns the mrm / filepath / too / long operation and retain the original numeric value before a framework converts it to an HRESULT or exception.
- For ERROR_MRM_FILEPATH_TOO_LONG, compare preconditions with the API documentation and reproduce with a minimal request before changing system-wide configuration.
Retry ERROR_MRM_FILEPATH_TOO_LONG only after the resource or state named in “Filepath too long.” has changed. For ERROR_MRM_FILEPATH_TOO_LONG, for invalid parameters, unsupported formats, missing objects, policy restrictions, and access failures, correct the input or configuration instead of immediately repeating the same call.
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