Error saving .umap

I suddenly am not able to save my project… I didn’t do any strange thing. Here the screen

Works now… you can close/delete.

Hey! I know it was long time ago, but could you please tell me how did you fixed it? I’m facing same problem in 4.20

In case anyone gets here via Google, the usual reason for this error message is that you have two copies of the editor running. Check task manager and background processes as well.

@rmclachlan_TCR THANK YOU for taking the time to post solution. Saved me. So simple!

@rmclachlan_TCR wow… thanks a lot! That was exactly what was going on… wouldn’t have check without you nudging us to check if multiple editors are running. Thanks a lot.