How To Fix AD601 - Do not change field 'DATALN'

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 601

• Message text: Do not change field 'DATALN'

What causes this issue?

You have not defined the field DATALN in the structure. This field
indicates the length of the VARDATA record and should always be defined
after the key fields.

System Response

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

How to fix this error?

Check the spelling or create the field DATALN INT2(5).
INCLUDE ADIC-POOL-STRUCTURE

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD601 - Do not change field 'DATALN' ?

  The SAP error message AD601, which states "Do not change field 'DATALN'," typically occurs in the context of data processing or data transfer within SAP systems, particularly when dealing with data structures or database tables. This error indicates that the field 'DATALN' is not meant to be modified or changed, likely due to its role in the system's data integrity or structure.
  Cause:
  
  Field Restrictions: The field 'DATALN' is likely a system-defined field that is not intended to be altered by users or during certain operations. This could be due to its role in maintaining data consistency or integrity.
  Data Transfer Issues: The error may arise during data uploads, migrations, or transformations where the system detects an attempt to modify a field that should remain constant.
  Custom Code: If there is custom ABAP code or enhancements that attempt to change this field, it could trigger this error.
  
  Solution:
  
  Review Code: If you are using custom ABAP code, review it to ensure that it does not attempt to modify the 'DATALN' field. Remove or comment out any lines that change this field.
  Data Uploads: If the error occurs during data uploads, check the data mapping and ensure that the 'DATALN' field is not included in the data being uploaded or modified.
  Consult Documentation: Refer to SAP documentation or notes related to the specific module or function you are working with to understand the role of the 'DATALN' field and any restrictions associated with it.
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration or version.
  
  Related Information:
  
  Field Purpose: Understanding the purpose of the 'DATALN' field within the context of your SAP application can help clarify why it should not be changed.
  SAP Notes: Check for any relevant SAP Notes that might address this error or provide guidance on handling it.
  System Configuration: Review your system configuration and any recent changes that might have led to this error.
  
  By following these steps, you should be able to identify the cause of the AD601 error and implement a solution to resolve it.