Sorry, I forgot to quote York's message. Here it is:
Hi Bill, Problem resolved, thank for help.In garnome0.29.1(the lastest), gnopernicus failed to work. By looking at its code,I found that gnome-speech has upgraded, the SynthesisDriver upgraded toversion 0.3, but gnopernicus still try to find version 0.2. After I changegnopernicus code to find SynthesisDriver 0.3. everything work. Regards York