# MMPBSA Energy Scoring Error

**URL:** <https://gromacs.bioexcel.eu/t/mmpbsa-energy-scoring-error/5880>\
**Category:** User discussions\
**Tags:** analysis-tools\
**Created:** [February 26, 2023, 6:23pm UTC](https://gromacs.bioexcel.eu/t/mmpbsa-energy-scoring-error/5880 "2023-02-26T18:23:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![isilver](https://avatars.discourse-cdn.com/v4/letter/i/13edae/32.png) [@isilver](https://gromacs.bioexcel.eu/u/isilver)\
**Post date:** [February 26, 2023, 6:23pm UTC](https://gromacs.bioexcel.eu/t/mmpbsa-energy-scoring-error/5880/1 "2023-02-26T18:23:01Z")

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GROMACS version:  
GROMACS modification: Yes/No  
Here post your question

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.