Dear Chimera users, I'd like to save a prmtop file of my protein after preparation for molecular dynamics simulation. I tried to do it by using Tools - Amber - write Prmtop . I get this reply log entry: _command: ['/gpfs/fs5/home-sh/sumbi463/.local/UCSF-Chimera64-2017-12-05/bin/amber16/bin/sleap', '-f', '/scratch/tmpOlw0GO/solvate.cmd']_ _Running sleap command: /gpfs/fs5/home-sh/sumbi463/.local/UCSF-Chimera64-2017-12-05/bin/amber16/bin/sleap -f /scratch/tmpOlw0GO/solvate.cmd_ _(writeprmtop) [gtkleap]$ source leaprc.ff14SB_ _(writeprmtop) Error: can not find file leaprc.ff14SB in all the search path._ _Failure running sleap_ I guess that it should source oldff/leaprc.ff14SB because the file seems to be in the directory oldff. But I don't know if that is right and were I have to change the path. Additionally, addions works perfectly although leaprc.ff14SB is also needed. So there the path seems to be set correctly. Is there anything I can do about it? Thank you Freia Krause Christian-Albrechts Universität zu Kiel,Germany