How To Fix CRM_BOL012 - Unattached entity was added to a collection

CRM_BOL012 - Overview

• Message type: E = Error

• Message class: CRM_BOL - Message Class for Business Object Layer

• Message number: 012

• Message text: Unattached entity was added to a collection

What causes this issue?

An attempt was made to add an unattached object (NULL reference) to a
business object collection or entity collection of the Business Object
Layer (BOL) by using method IF_BOL_BO_COL~ADD. This is a method
application error.

System Response

A short dump is triggered to force the correction of the error.

How to fix this error?

Contact the responsible developer.

Procedure for System Administrators

Check whether the object is attached before trying to add it to the
collection.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CRM_BOL012 - Unattached entity was added to a collection ?

  The SAP error message CRM_BOL012 ("Unattached entity was added to a collection") typically occurs in the context of the Business Object Layer (BOL) in SAP CRM applications. This error indicates that an entity (object) that is not properly attached to a parent object is being added to a collection. This can happen in various scenarios, such as when working with BOL collections in the context of UI development or when manipulating data in the backend.
  
  Cause:
  
  Improper Object Attachment: The entity you are trying to add to a collection has not been properly attached to its parent object. In BOL, entities must be linked to their parent entities before they can be added to a collection.
  Incorrect Data Model Usage: The data model may not be correctly set up, leading to attempts to add unattached entities.
  Programming Errors: If you are developing custom logic (e.g., in a BOL or UI5 application), there may be