Hi, I have a problem with Gromacs. I want to do MD simulations with my membrane proteïn in a POPE-membrane. Therefore I followed Justin Lemkul's tutorial on membrane proteïn simulation. I want to add ions. But when I use grompp to get a .tpr
file for genion, Gromacs fives the following error: /Program grompp, VERSION 4.0.7 Source code file: ../../gromacs-4.0.7/src/kernel/grompp.c, line: 320/ /Fatal error: No molecules were defined in the system / help me. shikha agarwal IIIT-A
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