From: Giacomo Fiorin (
Date: Sun Mar 31 2019 - 10:01:33 CDT

Hello Vidhyasankar, it's all in the message really: "built without TCL"
means that whoever built NAMD for your cluster forgot to include TCL
support. They should have read the following page:
which also provides pre-compiled TCL and FFTW for those who can't/won't
build them themselves.

On Sun, Mar 31, 2019 at 4:59 AM Vidhya Sankar <> wrote:

> Dear namd users
> When i run the namd in cluster it shoes the
> following error in .log file
> FATAL ERROR: Sorry, tclForces is not available; built without TCL.
> How to solve this proble in order to read my tcl script in in namd
> configuration file s during running
> With regards
> S.Vidhyasankar

Giacomo Fiorin
Associate Professor of Research, Temple University, Philadelphia, PA
Contractor, National Institutes of Health, Bethesda, MD

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