Hi dalacort, Simulation is a processor intensive activity. You can try again later and rerun a simulation after waiting a couple of minutes. This is to try to reduce the load on the servers. Please note however that your simulation will not run anyway. To understand why and what you may be able to do about it, please see: [https://easyeda\.com/andyfierman/Welcome\_to\_EasyEDA\-31e1288f882e49e582699b8eb7fe9b1f](https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f)

please be more specific about the problem of the forest of this circuit I have already done some reading in the suggested documents, but not very useful. if you can, thank you, Thank you

Please read the Preliminary Remarks in the Simulation Tutorial (Section 3 in my link above). You have placed devices in your schematic that do not have simulation models associated with them. You have also placed a complex digital device in your schematic that it is not possible to simulate in EasyEDA.