How To Fix IUUC_MAIN161 - Logging table creation failed: IUUC_SEQUENCE is not an IDENTITY column &1

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_MAIN - IUUC: Main Message class

• Message number: 161

• Message text: Logging table creation failed: IUUC_SEQUENCE is not an IDENTITY column &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_MAIN161 - Logging table creation failed: IUUC_SEQUENCE is not an IDENTITY column &1 ?

  The SAP error message IUUC_MAIN161 indicates that there was a failure in creating a logging table due to the IUUC_SEQUENCE not being defined as an IDENTITY column. This error typically occurs in the context of SAP Landscape Transformation (SLT) when setting up or configuring replication for data.
  Cause:
  The error arises because the system expects the IUUC_SEQUENCE column in the logging table to be defined as an IDENTITY column, which automatically generates unique values for new rows. If this column is not defined as an IDENTITY column, the creation of the logging table will fail.
  Solution:
  To resolve this issue, you can follow these steps:
  
  
  Check the Table Definition:
  
  Verify the definition of the logging table in the database. Ensure that the IUUC_SEQUENCE column is defined as an IDENTITY column.
  
  
  
  Modify the Table Structure:
  
  If the IUUC_SEQUENCE column is not set as an IDENTITY column, you will need to alter the table structure. You can do this using SQL commands. For example, in SQL Server, you might use:
  ALTER TABLE your_logging_table
  ALTER COLUMN IUUC_SEQUENCE INT IDENTITY(1,1);
  
  Note: The exact SQL command may vary depending on the database system you are using (e.g., SQL Server, HANA, etc.).
  
  
  
  Recreate the Logging Table:
  
  If altering the column is not feasible, you may need to drop the existing logging table and recreate it with the correct structure. Ensure you back up any necessary data before doing this.
  
  
  
  Check SLT Configuration:
  
  Review the SLT configuration settings to ensure that they are correctly set up for the replication process. This includes checking the source and target system configurations.
  
  
  
  Restart the Replication:
  
  After making the necessary changes, restart the replication process to see if the error persists.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  Documentation: Refer to the official SAP documentation for SLT to understand the requirements for logging tables and identity columns.
  Database-Specific Guidelines: Depending on the database you are using (e.g., HANA, SQL Server, Oracle), consult the specific guidelines for creating identity columns.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance.