This problem occurs because of the deactivated constraints in the command dialog.
To activate constraints again:
- Click on Dialog options and select more. (Also you can click down arrow at the bottom of the dialog box.)
- “Settings” tab will be opened in the dialog box.
- Look at the “Enabled constraints” tab whether or not any of the constraints deselected.
- Activate constraint if not the constraint deselected.
- You will see the activated constraints in the “Constraint” tab in the dialog box.