How To Fix BRF134 - General error in data source &1 - &2

BRF134 - Overview

• Message type: E = Error

• Message class: BRF - Messages for Business Rule Framework

• Message number: 134

• Message text: General error in data source &1 - &2

What causes this issue?

In the function module, an attempt was made to access a field of the
structure. The function module does not support access to the structure
(or access to the requested field of the structure).

System Response

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

How to fix this error?

Determine which expression causes this error. To do so:
Call transaction BRF.
In the toolbar of the navigation tree, choose the arrow on the right,
next to |@13@ with the quick info <ZK>Find BRF Object</> and then
<ZK>Find Expression</>.
The system displays the dialog screen <ZK>Find BRF Expression</>.
Call the input help for the <ZK>Expression</> field.
On the next dialog screen, choose one of the following tab pages:
<ZK>Field of a Structure</>
<ZK>Field of a Row of an Internal Table</>
Check the expressions of the structure.
To do so:
Choose an expression by double-clicking.
<ZH>Note</>: If the system opens the expression in display mode, switch
to change mode.
In the <ZK>Administrative Data</> section, choose |@38@ with the quick
info <ZK>Check</>.
Analyze the messages that are displayed.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

BRF134 - Details

• The SAP error message BRF134, which states "General error in data source &1 - &2," typically occurs in the context of the Business Rule Framework (BRF+) when there is an issue with the data source being accessed. This error can arise due to various reasons, including configuration issues, data inconsistencies, or problems with the underlying data source.
  Causes:
  
  Data Source Configuration: The data source may not be configured correctly in BRF+. This could include incorrect settings or missing parameters.
  Data Inconsistencies: There may be inconsistencies or issues with the data being retrieved from the source, such as missing records or invalid data formats.
  Authorization Issues: The user or process attempting to access the data source may not have the necessary authorizations.
  Technical Issues: There could be underlying technical issues, such as connectivity problems with the database or service that the data source relies on.
  Versioning Issues: If there are multiple versions of the data source or