Dear all,

I am trying to simulate an organic system. when I try to add ions, I faced the following error:

Fatal error:

Topology include file "tryptophan.itp" not found

I modified my .top file as the following:

#include "tryptophan.itp"

#include "./charmm27.ff/spc.itp"

#include "charmm27.ff/ions.itp"

How can I fix this error?

I am looking forward to getting your answer

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