About an error when I use tracer with opendaylight controller

[lsy2018]

Hello,
I am trying to use tracer with opendaylight controller. After I downloaded opendaylight 0.4.1 from their official site and run tracer, I account this error:

soot.CompilationDeathException: No input classes specified!
at soot.Main.postCmdLineCheck(Main.java:130)
at soot.Main.processCmdLine(Main.java:125)
at soot..Main.run(Main.java:235)
at soot.Main.main(Main.java:141)
at Main.main(Main.java:277)

Is this error caused by I didn't input the correct <path_to_project>? I guess I download the opendaylight from the official website and it is a packaged program and we do not need to compile it. So the tracer can not find the source code to analyze.

Could you please tell me some suggestions about this error?
Thank you.