[gmx-users] Reg g_energy tool

[vidhya sankar]

Thank you justin  for your kind reply.
As you told me in previous mail , the   g_energy  tool  is enough  to calculate interacton energy  (such as Coulombic and Vandeewaal's interaction , LJ interaction )  between groups  
but How to choose two groups simulataneously in command prompt 
for example if i want to calculate LJ-(SR)  interaction energy between CNT and peptide1
How to choose these two groups. 
already I set    
energygrps = CNT peptide1 petide2 in mdp file
thanks in advance