object selection tool

[Gin Tay]

hi

i encounter problem using object selection tool.

e.g. after i applied "object selection tool", and cmd J, then apply adjustment.  

after that apply flatten.  I have this msg

Could not complete your request because of a program error

can you help

[Guest]

Hi

I assume you're using Photoshop, what exact version do you have, I'll move the thread to the Photoshop forum

[c.pfaffenbichler]

Could you please post screenshots with the pertinent Panels (Toolbar, Layers, Channels, Options Bar, …) visible? 

What have you done for trouble-shooting so far? 

Restoring Preferences after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved might be a good starting point:

https://helpx.adobe.com/photoshop/kb/basic-trouble-shooting-steps.html

[Gin Tay]

see sequential steps attached. I used latest cc2021

[c.pfaffenbichler]

Your workflow seems peculiar – why Layer via Copy to apply an Adjustment and not simply use an Adjustment Layer? 

What is your OS version? 

https://helpx.adobe.com/photoshop/kb/known-issues.html#ps-desktop