Electronics 2000

Hello. I have been playing with software for simulation of electronics, including multisim and protues but i find these are not great when stringing together an RC oscilator when powered by DC. Does anyone know electronics emeulation software than handles RF emulation better?

Thank you

try adding grounds on it and other odd things its a math program so if anythink is to isolated from its self it will add to much math for it eg a dc power supply with earthed potentail eg scope and sig gen on a trasformer with pri earthed and sec not will create dumb errors so gound rails were apropreate and any other dumb stuff change to wrong tester settings alow it to start alow for a warm up time as well soft strating etc