GIMP Version: Newest
Operating System: Windows
GIMP Experience: Basic Level

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Thats it, my history has vanished, and i applied a couple things, and hit ctrl Z and nothing happened, so tried the menu undo, and there is not history, anywhere?

This happened to me once before last summer, i cant rem how to fix it?

Thank you

Do you mean in the middle of doing something? (can't help you there)
Once a picture is exported or saved and closed, when it is reopened you will not have any history.

Maybe if you let people know what you were doing so they can try and repeat the error

As i said, yes i was working on an image, and when i tried to ctrl z nothing happened. all history was gone, i did not close and open the doc.

They don't... What they can do is mess terribly with the undo stack so that after they exit, Gimp is unable to get things straight again. These filters should be fixed by their authors.

I would advise to have this dock always open/in your tabs
Windows > Dockable Dialogs > Undo History
If it happens again, you might want to have a look at this dock to see if all the history has disappeared or what's left inside.
But most important try to recall/reproduce the steps of what you did before your history problem.

Actually i do think i had run a filter and it came back saying there was an error that it failed to do something. It didnt seem important, hahahaha at the time, lmao. oh i need to go to bed. hahaha cant stop lol now. umm thank you. oh man..

im still lol , yes i ran a filter. some of them dont do anything, there is one that i couldnt see anything.. anyway, yes i agree.

Yeah, i had been working on several things, deep into it, right braining, working on 5 hours of sleep.. forgot to even finish my one cup of coffee. When boom in my face, no history. lol.

I had been using filters, and one of them went belly up and said it failed at something.. i dont rem now, and i suppose thats what did it. i could put the undo up on my other screen out of the way, er from working screen,