Regarding running nwchem


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Hello Deepak1032. What is your OS bitness? I think it may happen if the bitness is 32.

Try uname -m and file commands and you will get something like:
$ uname -m
x86_64

compiled version:
$ file ~Scientific/build-nwchem-6.0/bin/LINUX64/nwchem
build-nwchem-6.0/bin/LINUX64/nwchem: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, not stripped

or for binary version (NWChem Linux (Redhat 5.5, gcc/gfortran 4.1.2) binary, tar-ed and bzip2-ed compressed):
$ file ~Scientific/build-nwchem-6.0-binary-redhat-5-5-gcc-4-1-2/bin/nwchem
/ud/home/igor/Scientific/build-nwchem-6.0-binary-redhat-5-5-gcc-4-1-2/bin/nwchem: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, for GNU/Linux 2.6.9, not stripped

With best wishes.

Shmakov I. A.