Hi lamsung, Welcome to EasyEDA. This is not a bug. You are seeing this error because you are using a schematic symbol which does not have a simulation model associated with it. Please follow the guidance in this post: https://easyeda.com/forum/topic/How_to_find_simulatable_parts_and_run_a_simulation_in_EasyEDA-1YgasK2kC You will find a simulatable, parameterized crystal symbol in the spice system symbols section. :)