The camera on my GT-S5611V mobile comes up with the message DC operation fail.What does this mean?

If you’ve received the message “Warning: Camera Failed” on your Samsung Galaxy S3, don’t panic because it’s a simple problem and it needs a simple solution. In fact, it is more of a software glitch than hardware. Basically, I will suggest you to try simpler troubleshooting steps first before going further to a more complicated one.

FIXING CAMERA FAILURE ON GALAXY S3
There are, at least, three things you can do to try to fix this problem and let’s start from a very simple one:

CLEAR CAMERA CACHE & DATA

From the Home screen, press the Menu key.
From the options, tap Settings.
Find and tap Applications Manager.
Swipe twice to left to choose All tab.
Scroll to and tap Camera.
Tap Force Close button.
Tap Clear Cache button.
Tap Clear Data button. (Please note that all your settings and preferences will be deleted when you do this.)
Reboot your phone.
Check if the camera is now working.
Here’s the reason why you need to do this:

More often, camera failures are caused by corrupt cached data, which you need to clear. Tapping the Force Close button will stop the app from running. The Clear Cache button will delete all files used by the app when launched, while the Clear Data button will delete all settings including user’s preferences. This procedure will not affect other apps but the Camera app.