[Discuss-gnuradio] about importerror in gnuradio 3.7.0

[alex]

Dear list,

I want to move my out of tree model from gnuradio 3.6.5 to 3.7.0. I 
follow the introduction about how to move from 3.6 to 3.7. The code is 
able to build. However when I running the python script, still meet the 
importerror as follow:

ImportError: /usr/local/lib/libgnuradio-gmsktr.so: undefined symbol: 
_ZN2gr6filter24mmse_fir_interpolator_ffC1Ev

I have tried two days to find the bug but no progress.....does somebody 
have experience about this problem? Any suggestions would be appreciated!

Best regards

Alex