[AMBER] Error in nad+

From: Kapali Suri via AMBER <amber.ambermd.org>
Date: Sun, 21 Sep 2025 22:59:12 +0200

Respected,

I have nad+ frcmod, prepi and mol2 file, but in tleap when I'm adding in
complex files, I am facing this issue.

How should I resolve this error?

Kindly help me.

Error: For atom (.R<***** 1719>.A<C9 15>) could not find vdW (or other)
parameters for type (C.ar <http://c.ar/>)

Error: For atom (.R<***** 1719>.A<O17 17>) could not find vdW (or other)
parameters for type (O.3)

*Script I am using:*

source /home/neuron3/bin/amber22/dat/leap/cmd/oldff/leaprc.ff99SB

source leaprc.water.tip3p


loadamberparams
/storage/priya/bin/amber22/dat/leap/parm/frcmod.ionsjc_tip3p


loadamberparams /home/neuron3/bin/amber22/dat/leap/parm/gaff.dat


protein = loadpdb recep_A_amber.pdb

saveamberparm protein receptor.prmtop receptor.inpcrd


loadamberprep nad.prepi

loadamberparams nad.frcmod

nad_lig = loadmol2 nad.mol2


loadamberprep tclh.prepi

loadamberparams tclh.frcmod

tclh_lig = loadmol2 tclh_out_ligand_01.mol2


complex = combine {protein nad_lig tclh_lig}


solvatebox complex TIP3PBOX 10.0


addions complex Na+ 0

addions complex Cl- 0


saveamberparm complex complex.prmtop complex.inpcrd

savepdb complex complex.pdb


quit


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Received on Sun Sep 21 2025 - 14:30:02 PDT
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