# Getting error: No module named howto\_swig **URL:** \ **Category:** GNU Radio\ **Created:** [March 7, 2015, 7:38pm UTC](https://www.ruby-forum.com/t/getting-error-no-module-named-howto-swig/234479 "2015-03-07T19:38:18Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Post date:** [March 7, 2015, 7:38pm UTC](https://www.ruby-forum.com/t/getting-error-no-module-named-howto-swig/234479/1 "2015-03-07T19:38:18Z")
while building own custom block “square\_ff” for Gnuradio 3.7.3, my make test command was not successful. After checking in detail for the error with command “ctest -V -R square”, i got an error of “No module named howto\_swig”. also while doing cmake there was one of the statement “Disabling SWIG because version check failed”. I tried to troubleshoot be installing or upgrading SWIG, but it did not solve my error. ERROR: /home/abhishek/gnuradio-master/gr-howto/build/DartConfiguration.tcl Test project /home/abhishek/gnuradio-master/gr-howto/build Constructing a list of tests Done constructing a list of tests Checking test dependency graph… Checking test dependency graph end test 2 Start 2: qa\_square\_ff 2: Test command: /bin/sh “/home/abhishek/gnuradio-master/gr-howto/build/python/qa\_square\_ff\_test.sh” 2: Test timeout computed to be: 9.99988e+06 2: Traceback (most recent call last): 2: File “/home/abhishek/gnuradio-master/gr-howto/python/qa\_square\_ff.py”, line 24, in 2: import howto\_swig as howto 2: ImportError: No module named howto\_swig 1/1 Test #2: qa\_square\_ff …\*\*\*Failed 0.29 sec 0% tests passed, 1 tests failed out of 1 Total Test time (real) = 0.30 sec The following tests FAILED: 2 - qa\_square\_ff (Failed) Errors while running CTest Any suggestion will be appreciated Thanks in advance ---
**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\ **Post date:** [March 7, 2015, 10:43pm UTC](https://www.ruby-forum.com/t/getting-error-no-module-named-howto-swig/234479/2 "2015-03-07T22:43:45Z")
Hi Abhishek, the whole “howto” example introduction is kind of obsolete; I recommend following the new guided tutorials from [https://gnuradio.org/redmine/projects/gnuradio/wiki/Guided\_Tutorials](https://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials) Greetings, Marcus