[gmx-users] free energy and UB term

[lq z]

Dear GMXers,

I'm trying to manually add two sets of Urey-Bradley terms to the topology
file (in [angle] entry with type 5). However, it seems it is not allowed. I
got the following error:

Incorrect number of parameters - found 8, expected 4 or 4 for U-B.

Is it true that I can't do this in gromacs? Thanks.

Luke
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