Hi Chris Lalancette, Thanks for your quick reply. I just removed the already installed libvirt from my machine and did a *make install* in my CVS version of the code (which is in my machine at: /root/libvirt). The *make install* completed without any problems. But when I tried to compile the code, I get other error messages. I actually use the command: gcc `pkg-config --cflags --libs libvirt` -o myexample myexample.c The error messages I got are: Package libvirt was not found in the pkg-config search path. Perhaps you should add the directory containing `libvirt.pc' to the PKG_CONFIG_PATH environment variable No package 'libvirt' found myexample.c:9:29: error: libvirt/libvirt.h: No such file or directory Previously, I used the same command to compile and it compiled without any problems (if I had not used storage related apis). I think I am doing some silly mistakes. Please help me to rectify it. Thanks, Amudhan. Amudhan Gunasekaran wrote: This probably means that libvirtd and/or virsh is still using the old copy of the library. If you have a libvirt package installed, and then you built the the CVS libvirt by hand, the CVS version probably got installed somewhere to /usr/local/lib, which is in the search path after where libvirt is probably installed to /usr/lib. Try removing your libvirt package and doing a "make install" in the CVS version; you should then have everything matching up. Chris Lalancette