Autocad Undocked command window cannot be moved or docked

Undocked command window cannot be moved or docked
Issue

When you undocked your command window, you discovered that you could not move it or dock it again. This occurred regardless of whether Allow docking was activated in the command window's context menu or not. In the same context menu, the entries MOVE and SIZE were greyed out.
Solution

This issue can be caused by your toolbar and window locking settings. These settings are controlled by the LOCKUI variable.

To unlock the command window again

1. At the command prompt, enter lockui.
2. When prompted to enter a new value for LOCKUI, enter 0.

For more information about the variable LOCKUI, please refer to the online Help documentation.