I've been trying to create a pose with trans-ACPC, but when I use the X[TAC] in the sequence, it doesn't seem to know what residue it is. I know there's a params file for it... I tried loading a pdb structure with ACPC in it as my pose to see what'd happen and it says that:
"ERROR: Error in core::scoring::methods::RamaPreProEnergy::residue_pair_energy(): The RamaPrePro term is incompatible with cyclic dipeptides (as is most of the rest of Rosetta)."
Is it possible to design beta-peptides in PyRosetta? Am I doing something wrong?