hi, i have install CCP4 in /home/chandan/ccp4/ccp4-6.1.1. its open perfectly in this directory by using ccp4i command. but when i create a new user account in linux, then ccp4i was not working in new user account. please suggest me how i can run ccp4i in both user account thanks..... The INTERNET now has a personality. YOURS! See your Yahoo! Homepage. http://in.yahoo.com/