Error 43 EE_WIN_RUN_TIME_ERROR_CHECK signals an internal Windows runtime check failure in the MySQL server that immediately terminates the current operation.
MySQL Error 43 EE_WIN_RUN_TIME_ERROR_CHECK occurs on Windows when the server trips a runtime integrity check. Investigate the preceding message in the error log, remove or update the faulty component, and restart the instance to clear the error.
%s. EE_WIN_RUN_TIME_ERROR_CHECK was added in 8.0.13.
MySQL raises Error 43 EE_WIN_RUN_TIME_ERROR_CHECK when a low-level runtime assertion fails in the Windows build of the server. The condition was introduced in 8.0.13 to guard critical code paths. When triggered, execution halts and an error message like “%s. EE_WIN_RUN_TIME_ERROR_CHECK was added in 8.0.13.” appears in the client.
The placeholder %s is replaced by a more descriptive text in the MySQL error log.
That preceding line pinpoints the failing check, such as an invalid pointer, corrupted memory block, or plugin mismatch.
The server stops processing the offending statement and may shut down to protect data integrity. Ignoring the error risks corrupted tables, incomplete transactions, and unpredictable behavior. Production environments must diagnose and remove the root cause before resuming traffic.
Incorrect or outdated Windows runtime libraries frequently trigger the check.
Third-party storage engines, UDFs, or plugins compiled against older MySQL headers can violate internal contracts and hit the assertion.
Hardware issues such as bad RAM or abrupt power loss can corrupt in-memory structures the check is designed to validate. Sudden schema changes applied by concurrent sessions sometimes expose latent plugin bugs.
Start with the MySQL error log. The line before EE_WIN_RUN_TIME_ERROR_CHECK indicates the file and function that failed.
Identify whether the path belongs to the core server or an external module.
If a plugin is referenced, uninstall or upgrade it. For core code paths, confirm you are running the latest MySQL 8.0 release, then run CHECK TABLE on affected objects. Reboot the Windows host to rule out transient DLL conflicts.
After installing a custom full-text plugin, queries crash with Error 43.
Removing the DLL from the plugin directory and restarting resolves the issue.
Large import jobs on Windows Server 2016 fail sporadically. Updating the Microsoft Visual C++ Redistributable and MySQL to 8.0.36 eliminates the runtime check failures.
Always compile plugins against the exact MySQL version you deploy. Validate them in a staging environment that mirrors production.
Enable MySQL Enterprise Monitor or open-source Prometheus exporters to watch the error log in real time.
Early detection prevents cascading failures.
Galaxy users can run automated health checks from the SQL editor. The integrated AI copilot surfaces suspicious log entries and suggests fixes before the runtime check trips.
Error 1396 (HY000) – Operation CREATE USER failed: usually indicates permission issues, not runtime checks.
Error 1418 – Can’t load user-defined function: similar plugin involvement but occurs during dynamic linking rather than runtime checks.
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Not always. The server aborts only the current thread unless the failed check indicates global corruption, in which case it stops the entire service.
No. Even a single runtime check failure signals a severe problem that may corrupt data. Always investigate and patch.
Yes. EE_WIN_RUN_TIME_ERROR_CHECK is compiled only into the Windows source tree. Unix builds use different assertion handlers.
Galaxy’s log parser highlights the assertion message and suggests plugin or version fixes inside the SQL editor, accelerating remediation.
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