The link to your project was missing from your post: https://easyeda.com/FReynecke/Soft_Clipper_1-0ec11dd01d7042c9858af7b39ee432c1 * The problem is that you have chosen a schematic symbol for the 741 that does not have a simulation model assocated with it. * Please choose: SHIFT+F > System Components > Spice Simulation > Spice Miscellaneous > uA741 * Please also read (3) in: https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f :)

You might also like: https://easyeda.com/example/Tesseract_Guitar_Practice_Amp_simulation_files-H0ca8IFDB https://easyeda.com/example/Origami_a_collection_of_guitar_effects_-JFa4mEWe8

@components Thanks for the response. I tried a couple of the uA741 chips from the search but it still does the same. I'll read through the resources you suggested first tonight before querying further. Thanks for adding the link. Cheers!

@andyfierman Cool, I'll check them out. Thanks!