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

AD601 - Overview

• 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.

AD601 - Details

• 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