undo not working

I fixed the Undo problem.

1. Open your project in Dimension.

2. Drop in a simple cube. modify or move the cube.

3. Control Z on keyboard. This should undo the changes on your cube. if this works, then you should be fine.

4. Delete cube and continue working.

Same problem for me, this software is uselss if it cant do this - worked fine 2 days ago and now none of it works, i have half finsihed projects and the software doesnt work. Have emailed for help bu no response, and no idea why its not working

FOUND A WAY TO FIX IT! If u render you're work, the undo issue will be fixed. Happened to a few of us in my Graphic design class, and once we all rendered, it was fixed. 

Still not working. So frustrating.

Have the same problem here

I just found a fix that works for me.
> Open Dimension
> Make a new file
> Place a basic shape
> Modify that shape

> Check if Undo functionality works
> If it does, close the project but NOT Dimension.
> Open the project Undo wasn't working for.

This solved the problem for me.

Has this still not been fixed?

I'm having this issue sometimes too, I realize it happens when the file is big or the scene has a lot of textures/lights/Objects as if the program were having problems related to memory

Undo is suddenly not working. Using Big Sur. It wasn't a problem yesterday. 

Have you recently upgraded to Big Sur?

Works on Catalina.