I have downloaded the current free version of charmm C42b1.I have GAMESS version September 30, 2017 R2 for 64 bit (x86_64 compatible) under Linux with gnu compilers ,and I want to interface between Gamess and charmm for QM/MM calculation.BUt I can't find any instruction to patch Gamess in charmm in Milan pages for C42b1. Anyone able to give me some valuable instruction for the above reason .I am waiting for this .

Thanking to all