> Is it the crop tool you are reffering to?
> Which version of Lightroom are you using?
> Also, which operating system are you using?
> Are you getting any specific error message?
> Could you please post a screenshot?
Yes, i reffering to crop tool, the version is lightroom CC on windows 7. No error message appear, only the system not responding and "not responding" text appear un the windows title bar.