Once MCR 9.9 (R2020b) is properly installed, the file resides in:
: The DLL itself requires certain Microsoft Visual C++ Redistributable packages to be installed. If these are missing from the host machine, the DLL will fail to load even if it is present in the path. Resolution Steps mclmcrrt9-9.dll
sfc /scannow
: The required MATLAB Runtime R2020b (9.9) is not installed on the system. Once MCR 9
The plot thickened. It seemed that the former employee had brought the mclmcrrt9-9.dll file with him, possibly to use on his own projects. But why was it now missing? Had he intentionally deleted it, or was it a clever ruse to cover his tracks? The plot thickened
If the developer of your MATLAB-compiled application releases a version for a newer MCR (e.g., R2022b), consider updating. However, note that an app compiled for MCR 9.9 with MCR 9.10 or 9.8. MCR versions are strictly forward and backward incompatible.