Hello. Now I am trying to do mpi calculation, but I can not successfully finish "make" when i try to build G4MPI. Cmake was seemed to finish successfully. The line is below after pressing Cmake.
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[rnakamura@icarus build]$ cmake -DGeant4_DIR=/home/rnakamura/prefixforgeant4/usr/local/geant4/lib[64]/Geant4-10.4.0 -DCMAKE_CXX_COMPILER:FILEPATH="/share/apps/gcc/6.3.0/bin/g++" -DCMAKE_C_COMPILER:FILEPATH="/share/apps/gcc/6.3.0/bin/gcc"  -DCMAKE_INSTALL_PREFIX=/home/rnakamura/prefixforgeant4/usr/local/geantmpi /home/rnakamura/geant4.10.04/examples/extended/parallel/MPI/source/
-- The C compiler identification is GNU 6.3.0
-- The CXX compiler identification is GNU 6.3.0
-- Check for working C compiler: /share/apps/gcc/6.3.0/bin/gcc
-- Check for working C compiler: /share/apps/gcc/6.3.0/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /share/apps/gcc/6.3.0/bin/g++
-- Check for working CXX compiler: /share/apps/gcc/6.3.0/bin/g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found MPI_C: /share/apps/gcc/6.3.0/lib/libmpi.so (found version "3.1") 
-- Found MPI_CXX: /share/apps/gcc/6.3.0/lib/libmpi.so (found version "3.1") 
-- Found MPI: TRUE (found version "3.1")  
-- G4 Examples: libG4mpi uses includes from: /share/apps/gcc/6.3.0/include
-- G4 Examples: libG4mpi uses libraries: /share/apps/gcc/6.3.0/lib/libmpi.so
-- Configuring done
-- Generating done
-- Build files have been written to: /home/rnakamura/build
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and after Cmake I pressed "make", but the error was reported. The error is below.

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[rnakamura@icarus build]$ make
Scanning dependencies of target G4mpi
[  7%] Building CXX object CMakeFiles/G4mpi.dir/src/G4MPIbatch.cc.o
In file included from /home/rnakamura/geant4.10.04/examples/extended/parallel/MPI/source/src/G4MPIbatch.cc:33:0:
/home/rnakamura/geant4.10.04/examples/extended/parallel/MPI/source/include/G4MPImanager.hh:137:3: Error: ‘MPI’ does not name a type
   MPI::Intracomm COMM_G4COMMAND_;
   ^~~
make[2]: *** [CMakeFiles/G4mpi.dir/src/G4MPIbatch.cc.o] Error 1
make[1]: *** [CMakeFiles/G4mpi.dir/all] Error  2
make: *** [all] Error 2
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The installed Open MPI in PC is version 2.0.2. I am completely stacked here, so please give me kind advices.