Following on from this thread: https://www.redhat.com/archives/libvir-list/2007-March/thread.html#00341 The first attachment is a patch which changes the generated Python bindings so that they always raise an exception when an underlying error occurs in the C libvirt library. The second attachment is for information only (not to be applied) - it shows the differences in the generated file libvirtclass.py. I have checked each of these changes by hand against both the libvirt.c interface description and the C implementation of the Python bindings (libvir.c and libvirt-py.c), and each change seems correct. I have _not_ tested this against virt-manager. It is quite possible that virt-manager will cease to work if it wasn't checking the return values from affected functions carefully. I'll check this later today and supply a patch (to virt-manager) if necessary. I have some additional questions about the Python bindings, but I'll put those in a separate thread. Rich. -- Emerging Technologies, Red Hat http://et.redhat.com/~rjones/ 64 Baker Street, London, W1U 7DF Mobile: +44 7866 314 421 "[Negative numbers] darken the very whole doctrines of the equations and make dark of the things which are in their nature excessively obvious and simple" (Francis Maseres FRS, mathematician, 1759)