Do I have to build whole ns3 every time I write new script for running

[Abud Sarami]

Hello dear friends.

I am new to ns3 I have probably very simple question and I was searching for a solution whole day but still haven't found solution that works.

So, I very well understand some cc files with example, but when I try to write my own similar example (that is correct) and try to run it with ./ns3 run command, I get something like this:

Traceback (most recent call last):
  File "./ns3", line 1629, in <module>
    main()
  File "./ns3", line 1566, in main
    raise Exception("Couldn't find the specified program: %s" % target_to_run)
Exception: Couldn't find the specified program: examples/wireless/newexample.cc.

Also, even if I copy existing script file anywhere, including scratch folder, I'm not able to simple run my script but I have to build whole ns3, which take some time. Also, when I try --no-build, still same output.

Please help, I haven't found similar theme or answer to this question - how to run new cc scripts?

Thank you a lot!

[Abud Sarami]

And forgot to mention that existing ns3 examples and example scripts are working just fine.

[Tom Henderson]

If you want to run 'newexample.cc' without making modifications to the CMake build files, place 'newexample.cc' in the scratch/ directory, and run it like this (without the '.cc' extension in the command name):

./ns3 run newexample

The build system should generally (there may be a few exceptions) compile and link whatever is necessary to complete the command.  If you pass the `--no-build` argument, then nothing will be compiled and the program will just look for existing executables in the build/ directory.

Please read the ns-3 tutorial, it discusses these things.

- Tom

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