Hi, I am trying to install graph-tool on a SGI system. uname -a : Linux 2.6.16.60-0.69.1-default #1 SMP Fri Sep 17 17:07:54 UTC 2010 ia64 ia64 ia64 GNU/Linux Command line used : /home/arcadm/SGI/Software/graph-tool/graph-tool-2.2.9/configure --with-boost=/apps/packages/boost_1_45_0 --with-boost-libdir=/apps/packages/boost_1_45_0/lib --with-boost-python=/apps/packages/boost_1_45_0/lib/libboost_python.so --prefix=/apps/packages/graph-tool ENVIORNMENT VARIABLES: LDFLAGS=-L/apps/packages/boost_1_45_0/lib -L/apps/packages/cgal-3.6.1/lib CPPFLAGS=-I/apps/packages/boost_1_45_0/include -I/apps/packages/cgal-3.6.1/include -I/apps/packages/Python-2.6.6/include/python2.6 LD_LIBRARY_PATH=/apps/packages/cgal-3.6.1/lib:/apps/packages/RS:/apps/packages/taucs:/apps/packages/metis-4.0:/apps/packages/atlas-3.9.32/lib:/apps/packages/boost_1_45_0/lib:/apps/packages/gcc-4.4.4/lib:/apps/packages/mpfr-3.0.0/lib:/apps/packages/gmp-5.0.1/lib:/apps/packages/Python-2.6.6/lib I have made sure all the dependent libraries for graph-tool are taken care by the LD_LIBRARY_PATH. ERROR MESSAGE: checking for python2.6/Python.h... (cached) no results of the Python check: Binary: python2.6 Library: python2.6 Include Dir: no checking whether the Boost::Python library is available... no configure: error: No usable boost::python found config.log error message: configure:17155: checking for python2.6/Python.h configure:17155: result: no configure:17180: result: results of the Python check: configure:17182: result: Binary: python2.6 configure:17184: result: Library: python2.6 configure:17186: result: Include Dir: no configure:17198: checking whether the Boost::Python library is available configure:17228: g++ -c -Wall -ftemplate-depth-150 -Wno-deprecated -O99 -fvisibility=default -fvisibility-inlines-hidden -Wno-unknown-pragmas -I/apps/packages/Python-2.6.6/include/python2.6 conftest.cpp >&5 conftest.cpp:35:36: error: boost/python/module.hpp: No such file or directory conftest.cpp:36: error: 'boost' has not been declared conftest.cpp:36: error: 'python' is not a namespace-name conftest.cpp:36: error: expected namespace-name before ';' token conftest.cpp:37: error: expected constructor, destructor, or type conversion before '(' token configure:17228: $? = 1 I have attached config.log for your reference. python.h is installed in Python2.6/include/python2.6 and not Python2.6. I am not sure why it is searching for python.h in Python2.6. I can create a soft link inside Python2.6 to the actual file in Python2.6/include/python2.6 but I am not sure if that is the right way to go about it. Could you please help me out on this issue. -- Thanks Shankha Banerjee