How To Fix FDT_EXPRESSIONS181 - Result data object has a nested table, which is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 181

• Message text: Result data object has a nested table, which is not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS181 - Result data object has a nested table, which is not supported ?

  The SAP error message FDT_EXPRESSIONS181 indicates that there is an issue with a result data object that contains a nested table, which is not supported in the context where you are trying to use it. This error typically arises in the context of SAP's Form Data Technology (FDT) or when working with expressions in SAP applications.
  Cause:
  The primary cause of this error is that the data structure you are trying to use includes a nested table (a table within a table), which is not allowed in the specific context of the operation you are performing. This can happen in various scenarios, such as:
  
  When defining data objects in a form or report.
  When trying to process or manipulate data that includes nested tables.
  When using expressions that expect a flat structure but encounter a nested one.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Flatten the Data Structure: If possible, modify the data structure to eliminate the nested table. This may involve restructuring your data so that all relevant information is in a flat format.
  
  
  Use Alternative Data Structures: If flattening the data is not feasible, consider using alternative data structures that are supported by the context you are working in. This might involve creating separate tables or using different data types.
  
  
  Check Expression Logic: Review the expressions or calculations you are using to ensure they are compatible with the data structure. Make sure that you are not inadvertently trying to access nested elements in a way that is unsupported.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific module or tool you are using. There may be guidelines or best practices for handling data structures that can help you avoid this error.
  
  
  Debugging: If you are unsure where the nested table is being introduced, use debugging tools to trace the data flow and identify where the nested structure is being created.
  
  
  Seek Help from SAP Community: If the issue persists, consider reaching out to the SAP community forums or support for additional insights or solutions specific to your scenario.
  
  
  Related Information:
  
  SAP FDT Documentation: Review the official SAP documentation for Form Data Technology to understand the limitations and supported data structures.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide patches or updates that could resolve the issue.
  Data Modeling Best Practices: Familiarize yourself with best practices for data modeling in SAP to avoid similar issues in the future.
  
  By following these steps, you should be able to address the FDT_EXPRESSIONS181 error and ensure that your data structures are compatible with the requirements of the SAP system you are working with.