[gmx-users] File input/output error:

[willting]

 Dear all,
 
When I wrote "pdb2gmx -f MOL.pdb -o MOL.gro -p MOL.top",and  selected a  force field, it showed:
Opening library file /usr/local/gromacs/share/gromacs/top/ffG43a1.rtp
Opening library file /usr/local/gromacs/share/gromacs/top/aminoacids.dat
Reading MOL.pdb...
-------------------------------------------------------
Program pdb2gmx, VERSION 3.3.1
Source code file: /root/Desktop/gromacs-3.3.1/src/gmxlib/futil.c, line: 340
File input/output error:
MOL.pdb
what should I do?
Thanks,
will
  
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