Weird NameError

[Blmppes]

Hi guys, I'm doing the 00_pytorch_fundamentals exercises file. And I keep encountering this problem (NameError) everytime I assigned a new variable.
I'm VERY SURE that I had defined the variables before calling it, but it resulted in this error (image).
I can fix this actually, just need to run the cell again a few times. But this is very annoying and time-wasting
Anyone has any idea about this?
Thanks for your help!

[AumGupta]

I tried to reproduce the issue, but I was unable to. If you can tell the exact steps to reproduce the issues , please let me know or share your .ipynb at [email protected].

You can see above, I faced no issues.

One thing that you can try is Disconnect and Delete Runtime and then re-run your code.

[ErsiZhao]

yep, its google colab connection issue, need to restart colab