How To Fix CX126 - Configurations &1 and &2 are different (&3)

SAP Error Message - Details

• Message type: E = Error

• Message class: CX - Nachrichten für Konfigurationsprozess

• Message number: 126

• Message text: Configurations &1 and &2 are different (&3)

What causes this issue?

The two configurations being compared are different. For example, the
values assigned to characteristic &V3& are different.

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?

For more information about the differences between the configurations,
start report
<DS:REPN.RCU_COMPARE_CONFIGURATIONS>RCU_COMPARE_CONFIGURATIONS</>.
Make the following entries:
Configuration 1: &V1&
Configuration 2: &V2&
Note 901610 describes how to exclude characteristics from the
comparison.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CX126 - Configurations &1 and &2 are different (&3) ?

  The SAP error message CX126 indicates a configuration mismatch between two components or settings in the system. This error typically arises when there are inconsistencies in the configuration settings that are expected to be the same but are found to be different during processing.
  Cause:
  The error message CX126 usually occurs due to one of the following reasons:
  
  Inconsistent Configuration: The configurations for two related components (e.g., materials, plants, or other entities) are not aligned. This could happen if one configuration was changed without updating the other.
  Data Migration Issues: If data has been migrated from one system to another, inconsistencies may arise if the configurations were not properly aligned during the migration process.
  Custom Development: Custom programs or enhancements may lead to discrepancies if they do not adhere to the expected configuration standards.
  Transport Issues: If configurations were transported from one environment to another (e.g., from development to production) and not all related configurations were included, this error can occur.
  
  Solution:
  To resolve the CX126 error, you can follow these steps:
  
  Identify the Components: Check the error message details to identify which configurations (&1 and &2) are being compared and what the specific differences are (&3).
  Review Configuration Settings: Go to the relevant configuration transaction (e.g., SPRO) and compare the settings for the two components. Ensure that they are consistent and aligned.
  Correct Inconsistencies: If you find discrepancies, update the configuration settings to ensure they match. This may involve changing settings in one or both components.
  Check Transport Requests: If the issue arose after a transport, verify that all necessary configuration settings were included in the transport request. If not, transport the missing configurations.
  Consult Documentation: Review any relevant documentation or notes related to the specific components to ensure that you are following best practices for configuration.
  Testing: After making changes, perform testing to ensure that the error is resolved and that the system behaves as expected.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the CX126 error. SAP frequently updates its knowledge base with solutions for common errors.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in reviewing configurations, such as SPRO (Customizing), SE11 (Data Dictionary), or SE80 (Object Navigator).
  Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  By following these steps, you should be able to identify and resolve the configuration mismatch that is causing the CX126 error in your SAP system.