Dear all, Actually, I had google for this error message, but I can't understand the answer clearly, and it seems the previous question didn't finish yet.
I want to run a MD simulation with amber force field for a membrane protein. And the simulation box contains my goal membrane protein, POPC lipid and water, later will add ions. I choose the force field: amber99sb-ildn, and download the POPC.itp file from this website: http://bioinf.modares.ac.ir/software/mb/lipid_topology_files.htm In my top file, which will use in later grompp command. Top file as below: ; Include forcefield parameters #include "amber99sb-ildn.ff/forcefield.itp" #include "POPC.itp" ; Include chain topologies #include "tm_Protein.itp" #include "tm_Protein2.itp" #include "tm_Protein3.itp" #include "tm_Protein4.itp" ; Include water topology #include "amber99sb-ildn.ff/spce.itp" ; Include topology for ions #include "amber99sb-ildn.ff/ions.itp" ... After I type grompp command, it shows the error 'Atomtype NTL not found.' I found that the NTL atom-type showed in POPC.itp file. Can anybody help me to fix this problem? Or I should modify this itp file? Also, if you can't understand my question, please tell me and I will explain it clearly. Because it is important to me. Best wishes. Ta-Chou 黃大周/Ta-Chou Huang 生醫光電研究所/Institute of Biophotonics 生物醫學工程學院/School of Biomedical Science and Engineering 國立陽明大學/National Yang-Ming University 台灣台北市立農街155號2段/155, Sec. 2, Li-Nong St. Taipei, Taiwan 電話/Phone: +886-2-2826-7000#6201 手機/Mobile: +886-918-099-508 -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.