[gmx-users] Use of input -nr to calculate order parameter

Wally Davis wallydavis50 at yahoo.com
Wed Mar 8 23:19:48 CET 2017

I'm trying to use the g_order function. I have formated my .ndx file with one group per carbon and provide this file under the -n input option. However, I alway get the error that the -nr file is not found. What is the extra .ndx file I need to provide?

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