[gmx-users] Gromax NDG/BGLC Force field Error

[McDonnell, Thomas]

Hey

I am trying to do some MD of a glycoprotein, I've inputted the glycans through Charm-GUI online, but when I try to run simulations using any of the amber or charm forcefields, it throws up the error does not recognise NDG. My glycan pattern is:

N-Acetylglucosamine, N-Acetylglucosamine, Mannose (branch) (Mannose, N Acetylglucosamine, Galactose ) x2

How do I modify the input files to overcome this, or is there a different forcefield I should be using?

Thanks

Thomas.