Is this an issue that has only occurred  since the updates from V6.3.39? Please post some URLs of sim examples with which you are seeing this issue. If you wish to run the examples in the Simulation Tutorial please use the link to it from (3) in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)

I have tried clearing the cache in both Firefox and Chrome but that does not help. I can confirm that something in V6.3.41 is very broken in running and saving simulations that were created in a much rearlier version of EasyEDA. For example, the simulation that [alkopop79](https://easyeda.com/alkopop79)is posting about : [https://easyeda.com/example/Simulation_Quickstarter-iLN8usOaw](https://easyeda.com/example/Simulation_Quickstarter-iLN8usOaw) was created several years ago and now: 1. opens in Std mode but cannot be swapped into Sim mode;  2. cannot be saved;  3. therefore no longer runs

@UserSupport, What needs to happen is that the original author opens the simulations and saves them. Then when anyone else opens them they can be swapped into Sim mode and will then run. Is there a way to automate this?

@andyfierman Thank you!

OK, spent a few hours going through examples sims and resaving them so anything you find should now sawp into Sim more and run ok. Any you find that don't run, post back with the url and I'll try to fix it. :)

""...should now swap into Sim mode..." :)

If you see any messages like this:  just click OK. If the sim does not run please post back with the url. Thanks.

Thank you!!! I'm glad you managed to sort this out.

@alkopop79, Well...mostly. :)

@UserSupport, **I think this is a wider problem that makes it impossible to save all public files made before V6.3.39 unless they have been opened and resaved by their ownersin V6.3.39 or later.** Please see: [https://easyeda.com/forum/topic/Cannot-save-a-public-project-anymore-in-my-private-workspace-ef2b7462bf854cb9b5ae69c5feb87ead](https://easyeda.com/forum/topic/Cannot-save-a-public-project-anymore-in-my-private-workspace-ef2b7462bf854cb9b5ae69c5feb87ead)