[gmx-users] grompp error with charmm

[sarbani chattopadhyay]

  hi,
     I am trying to run gromacs using charmm but I am facing the following error while 
running the "grompp" command

 checking input for internal consistency...
calling /usr/local/bin/cpp...
topol.top:11:24: /usr/local/gromacs/share/gromacs/top/ffcharmm.itp: Permission denied
topol.top:696:28: /usr/local/gromacs/share/gromacs/top/tip3p-charmm.itp: Permission 
denied


Fatal error:
Invalid order for directive moleculetype, file ""topol.top"", line 13
 
I need help to fix this problem.
any suggestion is welcome.

Thanks in advance.
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