Mclmcrrt9-9.dll

File Name: mclmcrrt9-9.dll
File Type: Dynamic Link Library (DLL)
Common Path: C:\Program Files\MATLAB\R20XXx\bin\win64\ (or similar subdirectory)

mclmcrrt9-9.dll is a core component of the MATLAB Compiler Runtime (MCR), specifically version 9.9. The MCR is a standalone set of shared libraries that allows execution of compiled MATLAB applications or components on computers without an installed version of MATLAB. mclmcrrt9-9.dll

The naming convention breaks down as follows: File Name: mclmcrrt9-9

This suggests file corruption, perhaps from a bad download, incomplete installation, or antivirus quarantine. perhaps from a bad download

If the application was compiled with MCR 9.9, it will not work with MCR 9.8 or 9.10. The version numbers must match exactly. Many users mistakenly download a newer or older MCR version.