# (no subject) **URL:** \ **Category:** GNU Radio\ **Created:** [February 23, 2015, 10:29am UTC](https://www.ruby-forum.com/t/no-subject/234306 "2015-02-23T10:29:55Z")\ **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:** [February 23, 2015, 10:29am UTC](https://www.ruby-forum.com/t/no-subject/234306/1 "2015-02-23T10:29:55Z")
sir, I created a LPF block…when I execute " make test" command it shows the error like this: 2: Test command: /bin/sh “/home/lekha/gr-filters/build/python/qa\_lpf\_test.sh” 2: Test timeout computed to be: 9.99988e+06 2: File “/home/lekha/gr-filters/python/qa\_lpf.py”, line 28 2: def test\_002\_lpf(self): 2: ^ 2: IndentationError: unindent does not match any outer indentation level 2/2 Test #2: qa\_lpf …\*\*\*Failed 0.08 sec 50% tests passed, 1 tests failed out of 2 Total Test time (real) = 0.09 sec The following tests FAILED: 2 - qa\_lpf (Failed) Errors while running CTest what’s the solution…and also when I connect this block, it will not show any waveform and it gives error like this: Generating: “/home/lekha/top\_block.py” > > > Warning: This flow graph may not have flow control: no audio or usrp > > > blocks found. Add a Misc-\>Throttle block to your flow graph to avoid CPU > > > congestion. Executing: “/home/lekha/top\_block.py” Traceback (most recent call last): File “/home/lekha/top\_block.py”, line 15, in import filters File “/usr/local/lib/python2.7/dist-packages/filters/ **init**.py”, line 45, in from filters\_swig import \* File “/usr/local/lib/python2.7/dist-packages/filters/filters\_swig.py”, line 26, in \_filters\_swig = swig\_import\_helper() File “/usr/local/lib/python2.7/dist-packages/filters/filters\_swig.py”, line 22, in swig\_import\_helper \_mod = imp.load\_module(’\_filters\_swig’, fp, pathname, description) ImportError: /usr/local/lib/libgnuradio-filters.so: undefined symbol: \_ZN2gr6filter6firdes8low\_passEddddNS1\_8win\_typeEd > > > Done > > > what is the problem with this…please mail me.thank you ---
**Author:** ![Vishwanatha\_H\_G](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/f19dbf/32.png) [@Vishwanatha\_H\_G](https://www.ruby-forum.com/u/Vishwanatha_H_G)\ **Post date:** [February 23, 2015, 3:07pm UTC](https://www.ruby-forum.com/t/no-subject/234306/2 "2015-02-23T15:07:22Z")
On Mon, Feb 23, 2015 at 4:28 AM, Vishwanatha H G \< [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)\> wrote: > 2/2 Test #2: qa\_lpf …\*\*\*Failed 0.08 sec > > what’s the solution…and also when I connect this block, it will not show > any waveform and it gives error like this: That’s a Python error. Have you tried searching for that error on Google? It means you have malformed Python code. > File “/usr/local/lib/python2.7/dist-packages/filters/ **init**.py”, line > > > > > Done > > > > what is the problem with this..please mail me.thank you In your project, are you linking against libgnuradio-filter? Tom