MATLAB workspace not showing variables but a struct called 'wng'

I'm using MATLAB R2019B. My MATLAB workspace won't show any variables I claimed in the scripts or in the command window. Instead, it always shows a struct called 'wng'.

My MATLAB did crashed before I noticed this issue. It happens during plotting a figure. But I didn't pay any attention to these so I forgot what warnings or errors MATLAB returned to me exactly. I restarted MATLAB and found this problem. Then no matter how many times I restarted, the workspace wouldn't change any more.

Answer 1

[Sulaymon Eshkabilov]

did you use: >> clear all?

and restart your pc?

Answer 2

[Steven Lord]

Are you calling the built-in who function or a who.m that you've written or downloaded? What does this display?

which -all who

Answer 3

[Walter Roberson]

Your startup.m contains a line such as

wng = warning('off')

Answer 4

[Bohao Zhang]

Thanks for answering this question. The problem is about a third-party toolbox called IntLab_V12. There's one struct called 'wng' that handles all the warning.

[Walter Roberson]

It sounds as if your startup.m has a call to initialize that toolbox.