Hello, I;ve been having this problem in Fedora 7 Linux and I just recently built Csound from CVS under a fresh installation of Ubuntu Edgy and got the same. As I said in a previous post, what I did was: 1. Built Csound from CVS using doubles. 2. Installed using install.py script and set the environment variables. 3. Copied _csnd.so manually to /usr/lib/python2.5/site-packages (install.pydoesn't do it). 4. Started python and did a "import csnd", which gives this: $ python Python 2.5 (r25:51908, Oct 19 2007, 09:47:40) [GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import csnd Traceback (most recent call last): File "", line 1, in 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: csoundSetKillXYinCallback Am I doing something wrong? Thanks! Hector