If the runtime is installed but the error persists, ensure Windows knows where to find the file:

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.

Users typically see errors when the system cannot locate the file. Common messages include:

: A partial or failed installation of the runtime or the host application.

For a standard 64-bit installation, the expected path is: C:\Program Files\MATLAB\MATLAB Runtime\v99\runtime\win64 .