[Discuss-gnuradio] Signal processing block, ImportError, undefined symbol

[Michael Höin]

Hi all

I created a new signal processing block. The examples "howto_square_ff",
"howto_square2_ff" work fine. If I use "sudo make" and "sudo make
check" (with my new block included) I get an Error: 
"Traceback (most recent call last):
  File "./qa_howto.py", line 24, in <module>
    import howto
  File "/home/hoim/gr-howto-write-a-block-3.0.2/src/lib/howto.py", line
24, in <module>
    _howto = swig_import_helper()
  File "/home/hoim/gr-howto-write-a-block-3.0.2/src/lib/howto.py", line
16, in swig_import_helper
    import _howto
ImportError: /home/hoim/gr-howto-write-a-block-3.0.2/src/lib/.libs/_howto.so: 
undefined symbol: _Z25howto_make_detect_cut_vccjjjj" 

I saw in the Discuss-gnuradio a thread called "Help with Undefined
Symbol error --- undefined sy" with nearly the same problem, but in my
case I have not found a incorrectly named "make" function.

Any idea? Any help will be appreciated

Thanks
Michael