HELP - could not find a task generator

[David Janelidze]

Hello, I'm trying to implement LoRa module in ns-3. I've tried it for two different modules downloaded from github.

First one is this ===> https://github.com/signetlabdei/lorawan
And the second one is this ===> https://github.com/networkedsystems/lora-ns3

I prefer to include second one, however if any of them will work - it's fine.

The problem is the next: I copy folder of the module in the src folder, then I input command : ./waf configure --enable-tests --enable-examples and after that ./waf build, after ./waf build it outputs that ==> ' Could not find a task generator for the name 'ns3-lorawan-master' ' for the first one

and for the second one it says:

 wscript:104: Warning: (in LoRa) Requested to build modular python bindings, but apidefs dir not found => skipped the bindings.
 
Could not find a task generator for the name 'ns3-LoRa'
 
What I have to do? Please help, I really don't have much experience in networking and linux, but I need to do this please.

[Gabriel Arrobo]

Hello,

For the second repo try the followinig change in the wscript:

Change the following lines from:

#  if (bld.env['ENABLE_EXAMPLES']):

#      bld.recurse('examples')

bld.ns3_python_bindings()

to 

  if (bld.env['ENABLE_EXAMPLES']):

      bld.recurse('examples')

# bld.ns3_python_bindings()

In other words, remove the '#' from lines 101 and 102 and add '#' to line 104 (I understand/assume that you are not going to use the python bindings)

Best regards,
Gabriel

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[David Janelidze]

Thanks for response, I have tried that but after trying configure with ./waf configure --enable examples

it outputed this :

Traceback (most recent call last):
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Scripting.py", line 110, in waf_entry_point
    run_commands()
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Scripting.py", line 167, in run_commands
    parse_options()
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Scripting.py", line 140, in parse_options
    Context.create_context('options').execute()
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Options.py", line 146, in execute
    super(OptionsContext,self).execute()
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Context.py", line 93, in execute
    self.recurse([os.path.dirname(g_module.root_path)])
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Context.py", line 134, in recurse
    user_function(self)
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/wscript", line 249, in options
    opt.recurse('src')
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Context.py", line 134, in recurse
    user_function(self)
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/src/wscript", line 49, in options
    opt.recurse(module, mandatory=False)
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Context.py", line 128, in recurse
    wscript_module=load_module(node.abspath(),encoding=encoding)
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/.waf-1.8.19-b1fc8f7baef51bd2db4c2971909a568d/waflib/Context.py", line 354, in load_module
    try:exec(compile(code,path,'exec'),module.__dict__)
  File "/home/david/kidev/ns-allinone-3.28/ns-3.28/src/LoRa/wscript", line 101
    if (bld.env['ENABLE_EXAMPLES']):
                                   ^
IndentationError: unindent does not match any outer indentation level

So it didn't allow me to do it, however then I wrote #s on all three lines and tried configuring again and after ./waf build output was only this: " Could not find a task generator for the name 'ns3-LoRa' " <=== Could you please help me out for this one? Thank you in advance.

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[Gabriel Arrobo]

Taking into account that no example is enabled inside the lora/examples folder, just put back the '#' in front of lines 101 and 102. 

Best regards,
Gabriel

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[David Janelidze]

As I said I have done it already but how to solve  " Could not find a task generator for the name 'ns3-LoRa' " <== this problem? Thanks again.

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[Gabriel Arrobo]

I just downloaded ns-3.28 and clone the lora module in the SRC folder and ns-3 builds without any problem. I did not have to make any change in the lora module. Keep in mind that the module is called "lora".

Best regards,
Gabriel

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[David Janelidze]

Thank you very much, I will try on different PC, I didn't really get what's problem, but I will try thank you.

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[Gabriel Arrobo]

Just in case, the folder name is "lora", same as the module's name.

Best regards,
Gabriel

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[say...@gmail.com]

That means when you delete the "#", you also need to drag the if statement to exactly where it was.

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[Dayrene Frometa]

Hi David, I am trying to implement LoRa module in NS3 (the second one ==> https://github.com/networkedsystems/lora-ns3) and I got the same error:

wscript:104: Warning: (in lora-ns3-master) Requested to build modular python bindings, but apidefs dir not found => skipped the bindings.
 
Could not find a task generator for the name 'ns3-lora-ns3-master'

Have you finally solved this problem? Please help me I really don't have much experience in NS-3, but I need to do this.

Dayrene

[MYDHILY M R]

I am also having the same error. How did you solved it?

[Tom Henderson]

This error "Could not find a task generator for the name ..." arises when the name of the module directory does not match the name expressed in the module's wscript.

For instance, see this line:

https://github.com/signetlabdei/lorawan/blob/develop/wscript#L10

It declares the module name to be 'lorawan'.  If the directory containing this module is not named 'lorawan', but is instead something like 'ns3-lorawan-master', then Waf will raise that error.

- Tom

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[Harunur Roshid]

hi

i need to transfer packet among 4 nodes using  ns3.28.1 simulation version, how to get of this ns3 code. please help me sharing code. thnks

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[Enrique Geovanny Merino Vera]

hello, the wscript files in /lora/ and /lora/examples/ have problems with the ideation ... check them and correct those problems. 
You can check this module for comparison: https://github.com/signetlabdei/lorawan