How To Fix IUUC_MAIN053 - Key length exceeds the maximum for table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_MAIN - IUUC: Main Message class

• Message number: 053

• Message text: Key length exceeds the maximum for table &1

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_MAIN053 - Key length exceeds the maximum for table &1 ?

  The SAP error message IUUC_MAIN053 indicates that the key length for a specific table exceeds the maximum allowed length. This typically occurs in the context of SAP's Data Replication or Change Data Capture (CDC) processes, particularly when using the SAP Landscape Transformation (SLT) Replication Server.
  Cause:
  The error is triggered when the combined length of the key fields defined for a table exceeds the maximum limit set by the database or the SAP system. Each database has a maximum key length, and if the sum of the lengths of the key fields surpasses this limit, the error will occur.
  Solution:
  To resolve this issue, you can take the following steps:
  
  
  Review Key Fields: Check the key fields defined for the table in question. You can do this by examining the table structure in the Data Dictionary (SE11) or using transaction codes like SE14.
  
  
  Modify Key Definition: If possible, consider modifying the key definition:
  
  Reduce the Number of Key Fields: If there are non-essential fields included in the key, consider removing them.
  Change Data Types: If any key fields are defined with larger data types than necessary, consider changing them to smaller types.
  
  
  
  Database Configuration: Ensure that the database configuration allows for the maximum key length. If you are using a specific database (like HANA, Oracle, etc.), check the documentation for key length limits.
  
  
  Consult SAP Notes: Look for relevant SAP Notes that may provide additional guidance or patches related to this error. You can search the SAP Support Portal for notes related to IUUC_MAIN053.
  
  
  Testing: After making changes, test the replication process to ensure that the error is resolved.
  
  
  Engage SAP Support: If the issue persists after attempting the above solutions, consider reaching out to SAP Support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE14 (Database Utility), SLT Configuration.
  Documentation: Review the SAP Help Portal for documentation on SLT and CDC processes.
  SAP Notes: Regularly check for updates or patches that may address known issues related to key lengths in SLT.
  
  By following these steps, you should be able to identify the cause of the IUUC_MAIN053 error and implement a solution to resolve it.