MMPBSA Energy Scoring Error

GROMACS version:
GROMACS modification: Yes/No
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Hello,

I have just installed mmpbsa and it appears downloaded. However, when I attempt to run the program using the command:

g_mmpbsa -O -i mmpbsa.in -cs md_0_10.tpr -ci index.ndx -cg 21 22 -ct md_0_10.xtc -cp topol.top

I receive the following error:

g_mmpbsa: error while loading shared libraries: libgromacs.so.5: cannot open shared object file: No such file or directory

Please advise on what should be done to alleviate this error.