[gmx-users] -p topol.top input/output error

[Dialing Pretty]

Dear All,
 
When I use gromacs 4.0.5 practice the on-line tutorial on lysozyme, forgenbox -cp 1AKI_newbox.gro -cs spc216.gro -o 1AKI_solv.gro -p topol.top,
 
the output says File input/output error:
topol.top
Will you please give me some suggestions on how to solve the problem?
 
Cheers,
 
Dialing
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