Hi, Once more I'm dealing with an unresolved problem I've been experiencing since some time ago when building csound from CVS. I keep getting undefined symbols errors when Python tries to import csnd. Now i got it trying to run PartikkelExplorer: $ python '/home/hector/Desktop/PartikkelExplorer/PartikkelExplorer.py' Traceback (most recent call last): File "/home/hector/Desktop/PartikkelExplorer/PartikkelExplorer.py", line 19, in from csnd import * File "/usr/lib/python2.5/site-packages/csnd.py", line 7, in import _csnd ImportError: /usr/lib/python2.5/site-packages/_csnd.so: undefined symbol: _ZN17CsoundUtilityList5CountEv I'm building csound using doubles, dynamic libraries and interfaces and installing everything to /usr. The previous time I came to the list looking for help about this Michael Gogins tried very hard to help me but I just ran out of ideas since I'm not an expert in file linking or in C compilation in general. I made sure there is no previous installation of any older Csound file. I did a ldconfig, I did set LD_CONFIG_PATH and PYTHONPATH without success. Is there something in the building process that is failing to link csound.so with libcsnd? Some more information: $ nm /usr/lib/libcsnd.so.5.1 | grep _ZN17CsoundUtilityList5CountEv 0001bae0 T _ZN17CsoundUtilityList5CountEv $ nm /usr/lib/python2.5/site-packages/_csnd.so | grep _ZN17CsoundUtilityList5CountEv U _ZN17CsoundUtilityList5CountEv ]$ ldd /usr/lib/python2.5/site-packages/_csnd.so linux-gate.so.1 => (0xb7f07000) libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0xb7cf1000) libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7c06000) libutil.so.1 => /lib/libutil.so.1 (0xb7c02000) libcsound64.so.5.1 => /usr/lib/libcsound64.so.5.1 (0xb7b41000) libsndfile.so.1 => /usr/lib/libsndfile.so.1 (0xb7ae1000) libfltk.so.1.1 => /usr/lib/libfltk.so.1.1 (0xb7a37000) libasound.so.2 => /lib/libasound.so.2 (0xb7958000) libjack.so.0 => /usr/lib/libjack.so.0 (0xb793d000) liblo.so.0 => /usr/lib/liblo.so.0 (0xb7932000) libdl.so.2 => /lib/libdl.so.2 (0xb792d000) libpthread.so.0 => /lib/libpthread.so.0 (0xb7913000) libm.so.6 => /lib/libm.so.6 (0xb78ea000) libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb78de000) libc.so.6 => /lib/libc.so.6 (0xb7785000) /lib/ld-linux.so.2 (0x80000000) libXft.so.2 => /usr/lib/libXft.so.2 (0xb7772000) libXinerama.so.1 => /usr/lib/libXinerama.so.1 (0xb776e000) libXext.so.6 => /usr/lib/libXext.so.6 (0xb775e000) libX11.so.6 => /usr/lib/libX11.so.6 (0xb7662000) librt.so.1 => /lib/librt.so.1 (0xb7659000) libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0xb762a000) libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb759d000) libXrender.so.1 => /usr/lib/libXrender.so.1 (0xb7594000) libXau.so.6 => /usr/lib/libXau.so.6 (0xb7591000) libxcb-xlib.so.0 => /usr/lib/libxcb-xlib.so.0 (0xb758f000) libxcb.so.1 => /usr/lib/libxcb.so.1 (0xb7573000) libexpat.so.1 => /lib/libexpat.so.1 (0xb7551000) libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0xb754b000) Is there a way of manually creating this link after building with scons is finished? What would be the command for doing so? Using the Csound packages from the Fedora repository I don't get this kind of errors. I'll appreciate a lot any help since this problem has been an obstacle for me to start learning to program Csound GUIs using Python. Hector