How To Fix DA166 - Schema &1 defined more than once in program &2

DA166 - Overview

• Message type: E = Error

• Message class: DA - Dictionary: Compare, distribution, timer, instantiation

• Message number: 166

• Message text: Schema &1 defined more than once in program &2

What causes this issue?

A scheme was already defined with the same name.

System Response

The last definition is used for instantiation.

How to fix this error?

Remove the obsolete versions of the scheme from the scheme program.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

DA166 - Details

• The SAP error message DA166 indicates that a schema (in this case, identified as &1) has been defined more than once in a specific program (identified as &2). This typically occurs in the context of payroll processing or other areas where schemas are used to define rules and calculations.
  
  Cause:
  
  
  Duplicate Schema Definition: The most common cause of this error is that the same schema has been defined multiple times within the same program or in the same context. This can happen due to:
  
  Copying and pasting code without removing duplicates.
  Incorrect configuration or setup in the system.
  Multiple includes or function modules that define the same schema.
  
  
  
  Incorrect Program Logic: Sometimes, the program logic may inadvertently lead to the same schema being called or defined multiple times.
  
  
  
  Solution:
  
  
  Check Schema Definitions: Review the program code to identify where the schema is defined. Look for duplicate entries and remove or comment out the redundant definitions.
  
  
  Use Unique Names: If