3515855 - Purchase Order - Output Parameter Determination error "E WEBDYNPRO_RT 007"

During process for Output Parameter Determination setting, the following error occurs:

• "500 Internal Server Error
  Exception CX_FDT_INPUT occurred because of error: The changeability of the object was restricted by an application exit (Message E WEBDYNPRO_RT 007)"

SAP S/4HANA Cloud Public Edition

1. Access application: Output Parameter Determination
2. Select business rule: 
   2.2 Show Rule For: Purchase order
   2.3 Determination Step: Email Setting
3. Warning message: The current version of determination step 'Email Settings' is not active (Purchase Order). 
4. Click on check button: error:
   DT_EMAIL_SETTINGS (Expression) : Mandatory result column EMAIL_TEMPLATE_ID is missing. (Technical Details)
   DT_EMAIL_SETTINGS (Expression) : Please adjust the table settings. (Technical Details) 
   DT_EMAIL_SETTINGS (Expression) : The decision table is empty (Technical Details)
5. Click on Edit
6. Click Table setting
7. Remove column: Email_template_ID in Condition column area.
8. Insert column:
   8.1 Email_template_ID in Result column area
   8.2 PurchaseOrderType in Condition column area.
   8.3 PurchasingOrganization in Condition column area.
9. Uncheck mandatory input for Email_template_ID 
10. Set up like the screenshot attachment
11. Click OK
12. Click check
13. Warning message: 
    DT_EMAIL_SETTINGS (Expression) : The decision table is empty (Technical Details)
    DT_EMAIL_SETTINGS (Expression) : Next message refers to column Document Type (Technical Details)
    PURCHASEORDERTYPE (Data Object) : Domain values may not be unique (see value table T161 in DDIC) (Technical Details) Display Help
14. Click Activate
15. Error:
    "500 Internal Server Error
    Exception CX_FDT_INPUT occurred because of error: The changeability of the object was restricted by an application exit (Message E WEBDYNPRO_RT 007)"

Email Settings is not maintained for Purchase Order.

Please maintain Business Rules for Email Settings as per Setting Up Output Management - 1LQ. Refer the follow items:

• 4.3.3.1 Defining Business Rules for Output Parameter Determination
• 4.3.3.2 Defining Table Setting
• 3.1.2 Email
• 4.2 Setting Up Email 

Setting Up Output Management - 1LQ

Output Parameter Determination, OPD, Purchase Order, E WEBDYNPRO_RT 007, Email Settings, Output Management , KBA , CA-GTF-OC , SAP S/4HANA output management , Problem

SAP S/4HANA Cloud Public Edition all versions ; SAP S/4HANA Cloud all versions