How To Fix FDT_CORE159 - Expression types need to be assigned to system applications

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 159

• Message text: Expression types need to be assigned to system applications

What causes this issue?

You have tried to create a custom expression type. In addition, the
system has determined that the current application has been defined for
storage type <ZH>Customizing</> or <ZH>Master Data</>. However, custom
expression types can only be created for applications with storage type
<zh>System</>.

System Response

The object cannot be created.

How to fix this error?

To create custom expression types, make sure the application where you
want to create the expression type has storage type <zh>System</>
assigned.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE159 - Expression types need to be assigned to system applications ?

  The SAP error message FDT_CORE159 typically indicates that there is an issue with the expression types in the context of SAP's Flexible Data Import (FDI) or Flexible Data Transfer (FDT) framework. This error suggests that the expression types used in your configuration or data mapping are not properly assigned or recognized by the system applications.
  Cause:
  
  Incorrect Configuration: The expression types may not be correctly configured in the FDT framework.
  Missing Assignments: The expression types might not be assigned to the relevant system applications, leading to this error.
  Version Compatibility: There could be compatibility issues with the version of the FDT framework you are using.
  Data Model Issues: The data model may not be correctly defined, leading to mismatches in expected expression types.
  
  Solution:
  
  Check Expression Types: Review the expression types defined in your FDT configuration. Ensure that they are correctly set up and assigned to the appropriate system applications.
  Assign Expression Types: If the expression types are not assigned, you will need to assign them to the relevant system applications. This can usually be done in the FDT configuration settings.
  Review Documentation: Consult the SAP documentation for FDT to ensure that you are following the correct procedures for defining and assigning expression types.
  Test Configuration: After making changes, test the configuration to ensure that the error is resolved.
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as this may resolve compatibility issues.
  Consult SAP Support: If the issue persists, consider reaching out to SAP support for further assistance, providing them with details of the error and the steps you have taken.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  FDT Documentation: Review the official SAP documentation for Flexible Data Transfer to understand the configuration and usage of expression types.
  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 FDT_CORE159 error and implement a solution to resolve it.