CHARMM Development Project Forums User Discussion & Questions Other User Discussion and Questions Charmm in Ubuntu can not perform parallel computing

Hello everyone,

My server is Ubuntu. When I perform the command line "nohup mpirun -np 32 charmm setup1.out & ", only one CUP core can calculate. Ubuntu needs what libraries to run the charmm?
Can anyone help me? Thanks advance!

I have installed below libraries:
"apt install w3m w3m-img openmpi-bin libopenmpi-dev gcc g++ gfortran tcl grace \
samba cifs-utils samba-common cp2k bc csh flex xorg-dev zlib1g-dev libbz2-dev patch \
gromacs mpich bc csh flex xorg-dev zlib1g-dev libbz2-dev patch cmake"

What commands were used to build the charmm program? Were there any informational or warning messages regarding MPI from the build process?

The MPI libraries from Linux distributions typically lack the Fortran90 bindings (mpi.mod). With the GCC suite (gcc, gfortran, etc.), it is recommended to build the MPI library with Fortran90 support included, using the same compiler versions that will be used to compile charmm.

Please note that there is a specific forum for installation questions.

At line 164 of file /home/hj/program/charmm/source/util/parse.src (unit = 5, file = 'stdin')
Fortran runtime error: Sequential READ or WRITE not allowed after EOF marker, possibly use REWIND or BACKSPACE

How can I add the Fortran90 bindings (mpi.mod)? Thanks a lot!!!

Sorry, I would put my question on the correct model next time, thank you for your replying.

Thank you so much !! I have solve my problem, I installed all of the libraries among c35b2.cgenff.charmm/doc/parallel.doc. And I change my command line "nohup mpirun -np 32 charmm -i 1.chm -o 1.out &" instead of the wrong previous expression "nohup mpirun -np -32 <1.chm> 1.out &" And then, the parallel computing is performed. Thanks a lot !

Note that c35b2 is fairly old code, and a free version of c43b1 is available.