GROMACS version: 2024.2
GROMACS modification: Yes/No
Forcefield:charmm36-jul2022
Hello Gromacs users:
I’m doing simulation on peptides contain D-form Proline (VAL-D-PRO-PRO), and I encounter errors when forming ions.tpr
gmx grompp -f ions.mdp -c S2H5D8MAX1_box_solvate.gro -p topol.top -o ions.tpr
Ignoring obsolete mdp entry ‘title’
Ignoring obsolete mdp entry ‘ns_type’
NOTE 1 [file ions.mdp]:
With Verlet lists the optimal nstlist is >= 10, with GPUs >= 20. Note
that with the Verlet scheme, nstlist has no effect on the accuracy of
your simulation.
Setting the LD random seed to -1367515393
Generated 167799 of the 167910 non-bonded parameter combinations
Generating 1-4 interactions: fudge = 1
Generated 117432 of the 167910 1-4 parameter combinations
ERROR 1 [file topol_Protein_chain_A.itp, line 4582]:
No default Proper Dih. types
…
I check for topol_Protein_chain_A.itp file, and found it correspond to
C(VAL) N CPD1 C
Then i look for this parameter in ffbonded.itp and found this
C N CPD1 C 9 0.000000 3.347200 3 ;
So it seems like the parameter does exist, so I dont understand what’s wrong.
Any help will be appreciated!
Milo