| Error | Meaning | Fix | |-------|---------|-----| | mclmcrrt9-9.dll was not found | The app needs MCR 9.9, but the path C:\Program Files\MATLAB\MATLAB Runtime\v99\bin\win64 is missing. | Download and install the from MathWorks (free). | | The specified module could not be loaded | The DLL is present but a dependency (e.g., msvcr120.dll ) is missing. | Install Visual C++ Redistributables (2015-2022). Reinstall MCR. | | Bad image / 0xc000012f | The DLL is corrupted or built for a different architecture (32-bit vs 64-bit). | Uninstall all MCRs, reboot, reinstall the correct 64-bit version. | | Multiple versions warning | You have MCR 9.9, 9.10, 9.11, etc. installed simultaneously. | This is normal. Keep all. Each app uses its specific version. Do not delete any. |
sfc /scannow
This error usually indicates a bitness mismatch—for example, a 64-bit DLL being accessed by a 32-bit executable, or vice versa. mclmcrrt9-9.dll
Sometimes the application installer should have bundled the MCR but failed to do so. Check the application’s documentation for a “redistributable” or “runtime” setup. Uninstall and reinstall the actual software you are trying to run. | Error | Meaning | Fix | |-------|---------|-----|
Download and install the version corresponding to your OS (usually Windows 64-bit). Restart your computer after installation. 2. Check Your System Path | Install Visual C++ Redistributables (2015-2022)