How To Fix RSAR251 - Saving not possible, error in the transfer rules (change).

RSAR251 - Overview

• Message type: E = Error

• Message class: RSAR - Data Transfer and Metadata Maintenance

• Message number: 251

• Message text: Saving not possible, error in the transfer rules (change).

What causes this issue?

The total status of your transfer rules is &. Therefore, the transfer
rules cannot be consistently saved.
Possible causes:
There is no single InfoObject of the communication structure, that has
a transfer rule. You will see the following icons:
@01@
There are incorrect transfer rules. Following icon appears:
@03@

System Response

Back-up was not carried out.

How to fix this error?

Remove the error mentioned above.

Error message extract from SAP system. Copyright SAP SE.

RSAR251 - Details

• The SAP error message RSAR251, which states "Saving not possible, error in the transfer rules (change)," typically occurs in the context of data transfer processes, particularly when working with SAP BW (Business Warehouse) or SAP BI (Business Intelligence). This error indicates that there is an issue with the transfer rules that prevent the saving of changes.
  Causes:
  
  Incorrect Transfer Rules: The transfer rules may have been incorrectly defined or modified, leading to inconsistencies.
  Data Source Issues: The data source from which data is being extracted may have issues, such as missing fields or incorrect mappings.
  Inconsistent Data Types: There may be a mismatch in data types between the source and target fields.
  Missing or Inactive InfoObjects: The InfoObjects used in the transfer rules may be missing or inactive.
  Authorization Issues: The user may not have the necessary authorizations to save changes to the transfer rules.
  
  Solutions:
  
  Check Transfer Rules: Review the transfer rules for any inconsistencies or errors.