Hi Mr. Siggy Thanks for your reply. i imported ecj\ec files into a new project in eclipse. when i tried to run it, i got the below error in eclipse console and command prompt too. "Error: Could not find or load main class ec.Evolve" but i was able to clear this error now. for this what i did was deleted ".metadata" folder and created a new project again and imported the ecj\ec classes. i m able to run the tutorial1 using eclipse. but the problem still persists if i run through command prompt. please see the below screenshot. [image: Inline image 1] [image: Inline image 2] On Sun, Jan 31, 2016 at 8:52 PM, Eric 'Siggy' Scott <[log in to unmask]> wrote: > Vimaladevi, > > Can you give us some more information? How exactly are you trying to run > it? > > Siggy > > On Sun, Jan 31, 2016 at 1:48 AM, Vimaladevi M <[log in to unmask]> > wrote: > >> Hi All >> >> I am trying to ECJ for my research work. >> >> I get the following error when I try to run the tutorial programs. >> "Error: Could not find or load main class ec.Evolve" >> >> I have tried setting path variables and I am using Eclipse mars version >> >> Please help me out. >> >> -- >> >> Thanks & Warm Regards >> >> VIMALADEVI M >> >> Mobile No. 94423 65903 >> >> Mail to: [log in to unmask] >> >> >> > > > -- > > Ph.D student in Computer Science, George Mason University > CFO and Web Director, Journal of Mason Graduate Research > http://mason.gmu.edu/~escott8/ > -- Thanks & Warm Regards VIMALADEVI M Mobile No. 94423 65903 Mail to: [log in to unmask]