Q: How do I fix the Adobe Photoshop CS6 response code error? A: Try updating graphics drivers, resetting Photoshop preferences, disabling plugins, running Photoshop in Safe Mode, reinstalling Photoshop, or increasing system resources.

The "Response Code" in Adobe Photoshop CS6 is a unique alphanumeric string used specifically for Offline Activation

A machine-specific identifier generated by the offline computer after you enter your serial number.