How To Fix MDG_OITC_CUST004 - Key structure exceeds maximum length for key mapping

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_OITC_CUST - MDG. Object Identifier Type Code messages

• Message number: 004

• Message text: Key structure exceeds maximum length for key mapping

What causes this issue?

The &V1& <DS:DE.MDG_STRUCNAME_OBJECT_ID>key structure</> has an overall
length of &V2& characters. This length is calculated by adding the
output length of all fields to the length of all delimiters (if a
delimiter is defined for the key structure).
The &V4& <DS:DE.MDG_OBJECT_TYPE_CODE_BS>business object type</> to which
the &V3& <DS:GLOS.4A798A2196154E79E10000000A421945>Object Identifier
Type</> belongs is enabled for
<DS:GLOS.4B054D3963A24E75E10000000A421945>key mapping</>.
Key structures enabled for key mapping must not exceed 120 characters.

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

System Response

How to fix this error?

Choose from the following options:
Change the key structure so that its overall length is not greater than
120 characters.
Disable key mapping for object type &V4&.

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 MDG_OITC_CUST004 - Key structure exceeds maximum length for key mapping ?

  The SAP error message MDG_OITC_CUST004 indicates that the key structure for key mapping exceeds the maximum length allowed. This error typically occurs in the context of Master Data Governance (MDG) when you are trying to map keys between different systems or data sources, and the key structure you are using is longer than what is permitted by the system.
  Cause:
  
  Key Length Exceeded: The key structure you are trying to use for mapping exceeds the maximum length defined in the system. Each key mapping has a defined maximum length, and if your key structure surpasses this limit, the error will be triggered.
  Configuration Issues: There may be a misconfiguration in the key mapping settings or the data model that leads to the generation of excessively long keys.
  Data Model Design: The design of the data model may not align with the constraints of the key mapping, leading to longer keys than expected.
  
  Solution:
  
  Review Key Structure: Check the key structure you are using for mapping. Ensure that it adheres to the maximum length constraints defined in your SAP system. You may need to shorten the key or modify the way it is constructed.
  Adjust Configuration: If applicable, review the configuration settings for key mapping in the MDG system. Ensure that the settings are correctly defined and that they align with the expected key lengths.
  Data Model Adjustment: If the data model is causing the issue, consider redesigning it to ensure that the keys generated do not exceed the maximum length. This may involve changing how certain fields are concatenated or structured.
  Consult Documentation: Refer to SAP documentation or notes related to key mapping and MDG configurations to understand the specific limits and best practices.
  Testing: After making adjustments, test the key mapping process again to ensure that the error is resolved.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates regarding this error message.
  MDG Configuration Guide: Review the Master Data Governance configuration guide for best practices on key mapping and data model design.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed, and solutions shared.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.