<html><body><div style="color:#000; background-color:#fff; font-family:新宋体, nsimsun, sans-serif;font-size:13pt">Dear Sandeep, Thank you so much on your such rapid reply. ^_^ With this method, I donot have to specify ALCHEMICAL_CHANGE in MOTION section and mixed method right? Best regards, sun </div></body></html>