How To Fix AD628 - Pool fields reinitialized

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 628

• Message text: Pool fields reinitialized

What causes this issue?

You have changed the structure type from CLUSTER to POOL.

System Response

Since the fields have thus become invalid, the cluster field default
values will be stored.

How to fix this error?

If you do not wish to change the type, enter the old type again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD628 - Pool fields reinitialized ?

  The SAP error message AD628, which states "Pool fields reinitialized," typically occurs in the context of ABAP programming and is related to the use of internal tables and field pools. This error indicates that the system has detected a situation where the fields in a pool (a group of related fields) have been reinitialized, which can lead to unexpected behavior in your program.
  Cause:
  
  
  Reinitialization of Pool Fields: This error often arises when a program attempts to reinitialize fields in a pool that are already in use. This can happen if you are using a field pool in a way that conflicts with its intended use, such as trying to reset or clear fields that are still being referenced elsewhere in the program.
  
  
  Incorrect Use of Internal Tables: If you are manipulating internal tables and their associated field pools incorrectly, it can lead to this error. For example, if you are trying to read from or write to an internal table that has been cleared or reinitialized, you may encounter this issue.
  
  
  Dynamic Field Access: If you are using dynamic field access (e.g., using field symbols or dynamic programming techniques) and the fields are not properly managed, it can lead to inconsistencies and this error.
  
  
  Solution:
  
  
  Review Code Logic: Carefully review the code where the error occurs. Ensure that you are not unintentionally reinitializing fields that are still in use. Look for any CLEAR, REFRESH, or similar statements that might be affecting the field pool.
  
  
  Check Internal Table Usage: Ensure that internal tables are being used correctly. If you are clearing an internal table, make sure that you are not trying to access its fields afterward without repopulating it.
  
  
  Field Symbol Management: If you are using field symbols, ensure that they are properly assigned and dereferenced. Make sure that you are not trying to access a field symbol that has been cleared or reinitialized.
  
  
  Debugging: Use the ABAP debugger to step through the code and monitor the state of the fields and internal tables. This can help you identify where the reinitialization is occurring and why.
  
  
  Code Refactoring: If the logic is complex, consider refactoring the code to simplify the handling of field pools and internal tables. This can help prevent such errors from occurring in the future.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error. Sometimes, there may be known issues or fixes provided by SAP.
  Documentation: Review the ABAP documentation regarding internal tables, field pools, and dynamic programming to ensure best practices are being followed.
  Community Forums: Consider searching or posting in SAP community forums or discussion groups, as other developers may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the cause of the AD628 error and implement a solution to resolve it.