[libvirt-users] How to tell if a hypervisor connection has died?

Hi, What's the best way to tell if a virConnect object is not good to use anymore? (For example because the libvirtd on the other side crashed/has been stopped or because of some network failure) When I try this, the first API call I do on a broken connection yields an error with error number 38 (VIR_ERR_SYSTEM_ERROR) and all subsequent calls yield an error number 1 (VIR_ERR_INTERNAL_ERROR). Both of those are really unhelpful and could mean just about anything... Guido