How To Fix IU771 - Table &: IMIG for Unicode not possible for pooled tables

SAP Error Message - Details

• Message type: E = Error

• Message class: IU - Incremental Conversion (ICNV)

• Message number: 771

• Message text: Table &: IMIG for Unicode not possible for pooled tables

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message IU771 - Table &: IMIG for Unicode not possible for pooled tables ?

  The SAP error message IU771 indicates that there is an issue with the migration of pooled tables to a Unicode environment. This error typically arises when you attempt to migrate a non-Unicode database to a Unicode database, and it specifically pertains to pooled tables, which are not supported in a Unicode environment.
  Cause:
  
  Pooled Tables: Pooled tables are a type of database table in SAP that are designed to save space by storing multiple logical tables in a single physical table. However, these tables are not compatible with Unicode, which requires a different data storage format.
  Migration Process: During the migration process from a non-Unicode to a Unicode system, the system attempts to convert all tables, including pooled tables, which leads to this error since pooled tables cannot be converted to Unicode.
  
  Solution:
  
  Identify Pooled Tables: First, identify the pooled tables in your system. You can do this by checking the data dictionary (SE11) for tables that are defined as pooled.
  Convert to Transparent Tables: Convert the pooled tables to transparent tables. This involves creating new transparent tables that replicate the structure of the pooled tables and migrating the data from the pooled tables to these new tables.
  Data Migration: Use tools like the SAP Data Migration Workbench or custom ABAP programs to transfer data from the pooled tables to the new transparent tables.
  Adjust Application Logic: After migrating the data, ensure that any application logic that references the pooled tables is updated to reference the new transparent tables.
  Testing: Thoroughly test the new setup to ensure that all data has been migrated correctly and that the application functions as expected.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to Unicode migration for specific guidance and best practices. Some relevant notes may provide additional insights or tools to assist with the migration.
  SAP Documentation: Review the official SAP documentation on Unicode conversion, which provides detailed steps and considerations for migrating from non-Unicode to Unicode.
  Backup: Always ensure that you have a complete backup of your database before performing any migration activities.
  Consult SAP Support: If you encounter difficulties or have specific questions, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to resolve the IU771 error and successfully migrate your database to a Unicode environment.