The file is a critical component of the MATLAB Runtime environment, specifically associated with MATLAB R2020b (version 9.9) . It functions as a shared library that allows standalone applications (created using the MATLAB Compiler) to execute on systems that do not have a full version of MATLAB installed. Core Functionality
Often, the error message states "or one of its dependencies" is missing. This usually means that the necessary Microsoft Visual C++ Redistributable packages are not installed, which are required for the MATLAB Runtime to function. Summary Table Potential Cause Runtime R2020b missing Install MATLAB Runtime R2020b. App fails to start Wrong Runtime version Verify compiler version and install matching Runtime. UnsatisfiedLinkError (Java) Path not configured Add runtime bin/win64 to PATH .
Matlab R2015b 9.0 Runtime mclmcrrt9_0.dll attempting to load
First, determine which software is throwing the error. Look at the executable name (e.g., MySimulation.exe , DataAnalyzer.exe ). If you cannot tell, check the Windows Event Viewer under "Application" logs.
Follow these verified troubleshooting steps in order to resolve the issue safely. 1. Install MATLAB Runtime R2020b (Version 9.9) mclmcrrt9-9.dll
: The most common cause is that the system's PATH environment variable does not point to the folder containing the DLL.
The number "9.9" corresponds to a specific release of MATLAB (specifically, releases R2023a and R2023b).
To minimize the risk of issues with mclmcrrt9-9.dll, follow these best practices:
If the Runtime is installed but the app still can't find the file, you must add the path manually. The file is a critical component of the
The specific file mclmcrrt9_9.dll acts as the primary gateway. It is bundled directly with the . Every time a user double-clicks an app compiled in R2020b, the application calls upon this specific DLL to fire up the execution framework. Common Error Profiles
"The program can't start because mclmcrrt9_9.dll is missing from your computer."
This is the most frequent error. It appears when Windows cannot locate the DLL in:
: Ensure you download the version (Windows 64-bit) that matches your operating system. 2. Update Your System PATH This usually means that the necessary Microsoft Visual
After installation, ensure Windows can find the DLL:
Yes. You can have MCR 9.9 (v99) and MCR 9.12 (v912) side by side. Each has its own folder. However, they cannot be used interchangeably.
If you are developing or running applications built with MathWorks MATLAB, specifically MATLAB R2020b (version 9.9), you may eventually encounter an error involving . This file is a critical component of the MATLAB Runtime environment. When missing, corrupted, or incompatible, it can prevent compiled MATLAB programs from executing.