Fatal gmx2pdb error: POPC not found in residue topology base

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1

GROMACS version: 2025.1
GROMACS modification: No

Hello all,
I am looking to process a .pdb file of my unequilibrated system consisting of a POPC membrane, water, and my drug molecule using the pdb2gmx command. I am encountering the error that POPC is not found in the residue topology base despite having the .itp file included in the .top file I have created. Can anyone guide me as to how I can get GROMACS to recognize the residues and their topologies? See the screenshot for more information about the .top file I have made and the error message.

Thank you

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2

Have you checked the name of the residue in the pdb file and made sure it matches the name in the itp file?