When a script has been brought up at the Till, the script is locked so that it can't be edited elsewhere. In rare cases, a script can remain in a locked state, you can easily release locked scripts via the Till module.
From the Till module:
1. Click the Maintenance menu and select 5. Locked Scripts.
The Locked Scripts window is displayed.2. Highlight the scripts you want to release.
Tip To select more than one script, hold down [Ctrl] or [Shift] while you click them.
3. Click Release. The released scripts disappear from the Locked Scripts window and can now be processed via the Till.