Dear Sir, I am Pavan Kumar, pursuing B.Tech (Electronics and communication) final semester internship from IIT Hyderabad under the guidance of Dr. Amit Acharyya. My topic is related to interface properties of graphene on various substrates. For that I am using Molecular Dyanims Simulations using LAMMPS software, which needs MPICH2 as a prerequisite. I have downlaoded MPICH2 32 bit edition and installed it on my windows 8 pc. I've gone through the following steps in command window as an administrator and got every thing successful. 1) smpd - install 2) mpiexec -remove 3) mpiexec -register 4) mpiexec -validate 4) smpd -status but in my next step: mpiexec -np 4 Imp_win_mpi -in in.crack I'm facing an error like this " Launch failed : create process (Imp_win_mpi -in in.crack) on 'pc' failed. the system cannot find the file specified. Error posting writev, An estabhlished connection was aborted by the software in your host machine (10053). unable to post a write for next command sock error (10053) unable to post a write of the close command to tear down the job tree as a part of the abort process. Please Kindly help to rectify this error. Thanks & Regards, Venkata Pavan Kumar. Miriyala [email protected], contact number: +91-9032307746