AutoCAD @ not working in commands like copy and move

1. Type Units and see if the units are the same as you are typing.
Example:
Architectural will use 1"1"
Units will use  13 or 13"

2. Turn off Dynamic Input

• Press the F12 key to toggle it on and off.
• Verify if the DYNMODE variable is set on any value other than 0.
• Toggle the dynamic input icon in the lower-left or lower-right corner of the program: