[libvirt] timing issues of calling virsh on the command line

Hi, I've encountered some concurrency issues when calling virsh in a script. If I try to restore a VM too soon after it's been saved, libvirtd will stop responding. As well, if I try to save a VM too soon after it's been restored, libvirtd will stop responding. At the moment, I am not using any type of wait in my program for virsh to come back. I merely let the system call run its course and I assume that virsh will return when it's done waiting. Is there any type of wait that needs to occur in order to avoid these concurrency issues? Thanks, David