How To Fix DS161 - Program type changed from type &1 to type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: DS - Messages for Editing Text Elements in ABAP Programs

• Message number: 161

• Message text: Program type changed from type &1 to type &2

What causes this issue?

You tried to change the program type to or from "Executable program
(type 1)" or "Include program (type I)".
This can affect other program attributes, and possibly the entire
program structure.
The following attributes only apply to executable programs:
Logical database
Selection screen version
Include programs may not contain the following:
Text elements
User interface elements (screens and menus)
Documentation
Variants.

System Response

If the previous program type was "Executable program", the attributes
listed above will be lost when you save.
If the new program type is "Include program", text elements, and the
other elements listed above, will be deleted when you save.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DS161 - Program type changed from type &1 to type &2 ?

  The SAP error message DS161, which states "Program type changed from type &1 to type &2," typically occurs in the context of data transfer or data processing within SAP systems, particularly when dealing with DataStore Objects (DSOs) or InfoProviders in SAP BW (Business Warehouse).
  Cause:
  This error usually arises when there is a mismatch in the data types or structures between the source and target objects during data loading or transformation processes. Specifically, it indicates that the program or data structure has been altered in a way that is incompatible with the expected data type. This can happen due to:
  
  Changes in Data Model: If the data model has been modified (e.g., changing the data type of a field in the DSO or InfoObject), it can lead to this error.
  Inconsistent Data Types: If the source data type does not match the target data type, the system will throw this error.
  Transport Issues: If changes were transported from one system to another (e.g., from development to production) and the data types were not consistent, this error can occur.
  
  Solution:
  To resolve the DS161 error, you can take the following steps:
  
  
  Check Data Types: Verify the data types of the fields in both the source and target objects. Ensure that they match exactly. If there are discrepancies, you may need to adjust the data types in the source or target.
  
  
  Review Changes: If there have been recent changes to the data model, review those changes to ensure they are correctly implemented and that all dependent objects are updated accordingly.
  
  
  Re-activate Objects: If you have made changes to the data model, you may need to re-activate the affected objects (e.g., InfoObjects, DSOs) to ensure that the changes are recognized by the system.
  
  
  Check Transformation Rules: If you are using transformations to load data, check the transformation rules to ensure that they are correctly mapping the fields and that the data types are compatible.
  
  
  Data Load Monitor: Use the Data Load Monitor (transaction code LBWQ) to check for any additional error messages or logs that can provide more context about the issue.
  
  
  Test Data Load: After making the necessary adjustments, perform a test data load to verify that the issue has been resolved.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Review the SAP BW documentation for best practices on data modeling and loading processes to avoid similar issues in the future.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the root cause of the DS161 error and implement a solution to resolve it.