Once the Rule Engine script is created and enabled, it cannot be edited until it is disabled.
Click
to disable and the following screen appears-

Click
icon to edit the Rule Engine Script and the following screen appears.

Edit Rule Engine Script
Edit the name and description of the created Rule Engine Script in the respective fields.
Once the changes are performed, choose any one of the actions from below.
•Click
button to save the changes made.
•Click
to cancel the changes made.
•Click
to delete the Rule Engine Script.
Note: Disable the Rule Engine Script, before editing it.