Dear all,
I want to distance restrain for an ion and its associated residue. There are 5 polymer chain and 200 ions( 40 for each chain). I made restrain.itp for my desire atoms and their correspondig Atom(N). I can do restrain for 1 molecule but when I add 4 other polymer molecule and their ions Gromacs shows me this error:
NMR distance restraints with multiple copies of the same molecule are currently only supported with ensemble averaging. If you just want to restrain distances between atom pairs using a flat-bottomed potential, use a restraint potential (bonds type 10) instead.
what should I do for that ? How I can deal with such error and make .itp file for restrain?
Thank you,