# About importerror in gnuradio 3.7.0 **URL:** \ **Category:** GNU Radio\ **Created:** [December 9, 2013, 10:16am UTC](https://www.ruby-forum.com/t/about-importerror-in-gnuradio-3-7-0/237970 "2013-12-09T10:16:59Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Post date:** [December 9, 2013, 10:16am UTC](https://www.ruby-forum.com/t/about-importerror-in-gnuradio-3-7-0/237970/1 "2013-12-09T10:16:59Z")
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 ---
**Author:** ![alex](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/db5fbb/32.png) [@alex](https://www.ruby-forum.com/u/alex)\ **Post date:** [December 9, 2013, 12:16pm UTC](https://www.ruby-forum.com/t/about-importerror-in-gnuradio-3-7-0/237970/2 "2013-12-09T12:16:45Z")
On Mon, Dec 09, 2013 at 10:15:06AM +0100, alex wrote: > be appreciated! > What exactly did you try? What’s your GR version? > Have you read > [http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModulesConfig](http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModulesConfig)? MB – Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin B. Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT – University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association ---
**Author:** ![alex](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/db5fbb/32.png) [@alex](https://www.ruby-forum.com/u/alex)\ **Post date:** [December 10, 2013, 3:17am UTC](https://www.ruby-forum.com/t/about-importerror-in-gnuradio-3-7-0/237970/3 "2013-12-10T03:17:40Z")
On Mon, Dec 9, 2013 at 6:15 AM, Martin B. (CEL) [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > somebody have experience about this problem? Any suggestions would > > be appreciated! > > What exactly did you try? What’s your GR version? > Have you read > [http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModulesConfig](http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModulesConfig)? > > MB Also, check out the page explaining the differences between 3.6 and 3.7 to help you relocate where things are: [http://gnuradio.org/redmine/projects/gnuradio/wiki/Move\_3-6\_to\_3-7](http://gnuradio.org/redmine/projects/gnuradio/wiki/Move_3-6_to_3-7) Tom