Gnuradio crash after installing own block - c++

Question

i am trying to install a own Block for gnuradio. I go through this(http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_GNU_Radio_in_C++) tutorial. But in Step 5, Installing, I get some problems.
I installed it, but i didnt see the Block in gnuradio-companion.
I added the path:
export PYTHONPATH=/usr/local/lib/python2.7/site-packages/
export GRC_BLOCKS_PATH=/usr/local/share/gnuradio/grc/blocks/
Now i can see the Block: But if I want to use it, the gnuradio-companion crash.
^[[A^[[BFatal Python error: PyThreadState_Get: no current thread
Abort trap: 6
Gnuradio Version: 3.7.10.1
OS: OS X El Capitan
What could be the problem? Wrong/Missing path? Mistake in the program?
/edit2: To add a Block, writen in python works fine(With the tutorial: http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_GNU_Radio_in_Python)
/edit: When I install it, I get many warnings when i use cmake:
-- Build type not specified: defaulting to release.
-- Boost version: 1.59.0
-- Found the following Boost libraries:
-- filesystem
-- system
Checking for GNU Radio Module: RUNTIME
* INCLUDES=/opt/local/include
* LIBS=/opt/local/lib/libgnuradio-runtime.dylib;/opt/local/lib/libgnuradio-pmt.dylib
GNURADIO_RUNTIME_FOUND = TRUE
CMake Warning (dev) at cmake/Modules/GrTest.cmake:45 (get_target_property):
Policy CMP0026 is not set: Disallow use of the LOCATION target property.
Run "cmake --help-policy CMP0026" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.
The LOCATION property should not be read from target "test-tutorialCPP".
Use the target name directly with add_custom_command, or use the generator
expression $<TARGET_FILE>, as appropriate.
Call Stack (most recent call first):
lib/CMakeLists.txt:77 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.
-- Using install prefix: /usr/local
-- Building for version: v1.0-compat-xxx-xunknown / 1.0.0git
--
-- Checking for module SWIG
-- Found SWIG version 3.0.10.
CMake Warning (dev) at cmake/Modules/GrTest.cmake:45 (get_target_property):
Policy CMP0026 is not set: Disallow use of the LOCATION target property.
Run "cmake --help-policy CMP0026" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.
The LOCATION property should not be read from target
"gnuradio-tutorialCPP". Use the target name directly with
add_custom_command, or use the generator expression $<TARGET_FILE>, as
appropriate.
Call Stack (most recent call first):
python/CMakeLists.txt:44 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.
CMake Warning (dev) at cmake/Modules/GrTest.cmake:45 (get_target_property):
Policy CMP0045 is not set: Error on non-existent target in
get_target_property. Run "cmake --help-policy CMP0045" for policy details.
Use the cmake_policy command to set the policy and suppress this warning.
get_target_property() called with non-existent target
"/opt/local/bin/python2.7".
Call Stack (most recent call first):
python/CMakeLists.txt:44 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.
CMake Warning (dev) at cmake/Modules/GrTest.cmake:45 (get_target_property):
Policy CMP0045 is not set: Error on non-existent target in
get_target_property. Run "cmake --help-policy CMP0045" for policy details.
Use the cmake_policy command to set the policy and suppress this warning.
get_target_property() called with non-existent target
"/Users/abc/dev/gnuradio/modul/gr-tutorialCPP/python/qa_my_qpsk_demod_cb.py".
Call Stack (most recent call first):
python/CMakeLists.txt:44 (GR_ADD_TEST)
This warning is for project developers. Use -Wno-dev to suppress it.
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/abc/dev/gnuradio/modul/gr-tutorialCPP/build

Answer 1

This happens when GNU Radio and your module are linked against different Python libraries.
On OSX, there is usually a system installation and another one from Homebrew or MacPorts. Try linking everything against the Homebrew/MacPorts libraries.
You seem to have a Python installation in /opt/local. Use cmake to reconfigure your module and point PYTHON_LIBRARY and PYTHON_INCLUDE_DIR to the installation in /opt.