NAMD Simulation Error: Missing vdW Parameter for Atom Type OSLP ?

Gabriel L. Carvalho @Gabriel-Carvalho-57

01 April 2025 1 1K Report

I'm trying to do a simulation with NAMD, specifically the tutorials: Modeling Nanopores for Sequencing DNA by: Jeffrey R. Comer, David B. Wells and Aleksei Aksimentiev. I'm in chapter 3.2: Building and equilibrating α-hemolysin. However, in the minimization part I'm encountering the following error: "FATAL ERROR: DIDN'T FIND vdW PARAMETER FOR ATOM TYPE OSLP" I'm using vmd 1.94, and the toppar_c32b1 files available on the CHARMM website. (par_all27_na.prm and par_all27_prot_lipid.prm) Any suggestions to fix this error?

Rituparna Hazra

Hi, you can simply check the parameter files and see whether the vdW parameters for 'OSLP' are missing or not. If missing, you need to find them from other sources.

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