Hi, I'm a student of Pharmacy and I just learn about chimera.

Actually, I want to run a docking using Autodock so I have to minimze the structure of macromolecule first. I choose Chimera to minimize the structure of macromolecule. However, there is an error because the Fe atom doesn't have GAFF

"Unable to find GAFF type for #0:500.A@FE"

I also have a problem with hydrogen at Histidin residu

"no MMTK name for H at standard HIS"

How can Isolve this problem?

I'll be very thankful for your answers.

Best Regards, 

Agus Lee.