KIC is not working

[Ashduc]

Hello
I am using Interactive rosetta to model missing residues in my protein.
I am getting the following error when doing KIC
Thanks in advance

ERROR: Error in core::chemical::ResidueTypeSetCache::add_residue_type(): Attempting to add a new residue type, but it already exists in the cache. (Did you load a .params file with the -extra_res_fa commandline option that was already listed in residue_types.txt, perhaps?)
ERROR:: Exit from: src/core/chemical/ResidueTypeSetCache.cc line: 57

[ltkdja]

I also encountered this problem when doing Point Mutant Scan. Anyone can help?