Hi, i'm doing final year project. i'm doing in a project center .if i execute the program in project center means it runs. The same code if i double click the batch file or type the file in command prompt (java idpf.com.ASystemX) in my pc it shows the following error "exception in thread "main" java.lang.noclasdeffounderror : idpf/com/ASystemX " the guide who is working in the center told that my pc is having problem. he doesn't know how to rectify that . plz tell me.