Hey jin lian
I guess you need to remove the parentheses before "self.residue_range". They are not necessary or else, you need to compete those parentheses. This is not the problem of modeller, rather its mainly related to python script.
hope this helps.
=================================================================== If your ship doesn't come in, swim out to it.......Jonathan Winters =================================================================== Pankaj R. Daga | Department of Medicinal Chemistry | e-mail: pdaga_at_olemiss.edu 417 Faser Hall, School of Pharmacy | fax: +1-662-915-5638 University of Mississippi | phone: +1-662-915-1853 University, MS, 38677-1848 | ===================================================================