Penguin - aslong as you don't perform one step you can cancel a synth without losing any mats, op however is talking about dcing before 1 step has been performed, this loses all mats which it shouldn't.
Once again from my previous thread recently, all steps should be saved to protect against dc's but at the same time worked that it cannot be abused if you get a bad run
I lost 5mil of mats after 2 steps due to a very very rare dc