[Chimera-users] Cannot Minimize the Water Molecules

Dear all, I am trying to minimize the crystal structure of a protein using Chimera. But the program could not minimize the water molecules of the protein. I added hydrogen atoms to the whole structure. But during the minimization, it is showing the following error: No MMTK name for atom "H" in standard residue "HOH" It would be very helpful for me if you can suggest what changes I should make. Thank you! Sincerely Gourav Das Research Scholar Department of Chemistry IIT Kharagpur India