Could NOT find MPI (missing: MPI_CXX_FOUND)

This error message usually occurs when the MPI (Message Passing Interface) library is not found or not installed on your system. MPI is used for parallel computing and communication between processes.

To solve this issue, you can try installing the MPI library on your system or make sure that it is properly configured in your project settings. You can also check if the MPI compiler and header files are present in the correct paths.

If you are using CMake, you can enable MPI support by adding the following lines to your CMakeLists.txt file:

find_package(MPI REQUIRED)
include_directories(${MPI_INCLUDE_PATH})
target_link_libraries(your_target ${MPI_LIBRARIES})

This should help resolve the missing MPI error.