Hello all, I am struggling with a python crash of an ipython notebook (kernel) that I do not know how to debug. If I run this: (valgt is a pandas dataframe with 354 lines and 14 numerical columns) sns.pairplot(valgt) plt.savefig('parvis.png', dpi=600) in the same cell, the kernel consistently crashes. If I run in two separate cells, or exporting to a Python script and running there (changing the inline render to qt), everything is OK. This is win64 on Win7, both the free build from conda, the accelerate build from conda, and also a version I have built myself. (VS2010 and Intel Fortran XE 2015) The following is the package list from the 'vanilla' conda: # packages in environment [...]: # dateutil 2.1 py34_2 ipython 2.3.1 py34_0 jinja2 2.7.3 py34_1 markupsafe 0.23 py34_0 matplotlib 1.4.2 np19py34_0 numexpr 2.3.1 np19py34_0 numpy 1.9.1 py34_0 pandas 0.15.2 np19py34_0 pip 6.0.6 py34_0 pyparsing 2.0.1 py34_0 pyqt 4.10.4 py34_0 pyreadline 2.0 py34_0 python 3.4.2 1 pytz 2014.9 py34_0 pywin32 219 py34_0 pyzmq 14.5.0 py34_0 rpy2 2.5.5 <pip> scipy 0.15.1 np19py34_0 seaborn 0.5.1 np19py34_0 setuptools 12.0.5 py34_0 six 1.9.0 py34_0 tornado 4.0.2 py34_0 rpy2 is from the Gohlke python collection. The home-built version is a python 3.4.3rc1, with certifi (14.5.14) Cython (0.21.2) ipython (2.4.1) Jinja2 (2.7.3) jsonschema (2.4.0) MarkupSafe (0.23) matplotlib (1.4.2) mistune (0.5) nose (1.3.4) numexpr (2.4.1.dev0) numpy (1.10.0.dev0+98a8fe3) pandas (0.15.2) pip (6.0.8) pyparsing (2.0.3) pyreadline (2.0) PySide (1.2.2) python-dateutil (2.4.0) pytz (2014.10) pywin32 (219) pyzmq (14.5.0) rpy2 (2.5.6) scipy (0.15.1) seaborn (0.6.dev0) setuptools (12.0.5) six (1.9.0) tornado (4.1) wheel (0.24.0) They crash in the same way, though, the same applies to a test I did with ipython 3 I am wondering how important it is to have everything built with the same compiler and MKL library. Does all packages that use numpy need to be built against the specific numpy+mkl version? For example rpy2 (which is not used near the cells where it crashes), should I always rebuild this as well if I build differently, or...? And, how can I generate debug information from the kernel that ipython notebook starts? Any pointers are most appreciated. -- mvh, Åsmund Hjulstad