I want to perform MD on RT ionic liquids using an amber force field. I have generated mol2, frcmod files. Then, I loaded my complex.pdb, which contained dmc and TTE (generated using Packmol).when I tried to run this command (> saveAmberParm ionicbox complex.prmtop complex.inpcrd)then I encountered this error:

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

FATAL: Atom .R.A does not have a type.

Error: Failed to generate parameters

Warning: Parameter file was not saved.

I tried to solve it but was unable to.Can anyone help me figure it out?

thank you

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