Dear Justin I enclosed the group name Protein-H and DNA-H in quotes ' ' and " ".
waterO = group SOL and name OW; heavy1 = group 'Protein-H'; heavy2 = group 'DNA-H'; inter = waterO and within 0.3 of heavy1 and within 0.3 of heavy2; inter; waterO = group SOL and name OW; heavy1 = group "Protein-H"; heavy2 = group "DNA-H"; inter = waterO and within 0.3 of heavy1 and within 0.3 of heavy2; inter; but in both of states again: selection parser: syntax error heavy1 = group 'Protein-H''lection ' ------------------------------------------------------- Program g_select, VERSION 4.5.1 Source code file: trajana.c, line: 1310 Input error or input inconsistency: selection(s) could not be parsed For more information and tips for troubleshooting, please check the GROMACS website at http://www.gromacs.org/Documentation/Errors -- Leila Karami Ph.D. student of Physical Chemistry K.N. Toosi University of Technology Theoretical Physical Chemistry Group
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