<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Dear XAvier</div><div><br></div><div>Thank you very much from your response.</div><div>Yes, I defined mapping in atomistic topology as:</div><div>[mapping ]<br> 1 1 2 3 4 5 6</div><div>because for butanole we have one bead.</div><div>Please help me.</div><div><br></div><div>Best Regards</div><div>Dina<br></div></div></body></html>