How To Fix FDT_EXPRESSIONS323 - Table &1: Complex table structure not supported for mail recipients

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 323

• Message text: Table &1: Complex table structure not supported for mail recipients

What causes this issue?

For the current email action, you have defined that the mail recipients
shall be read from table &v1&. However, the line type of this table is
based on a structure data object with more than one field. This is not
permitted.

System Response

The email action cannot be activated.

How to fix this error?

Replace table &v1& by a table where the line type contains only one text
field from which the email addresses are read by the system. As an
alternative, you can also use a table where the line type is defined by
a structure data object as long as this structure contains no more than
one text field.

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_EXPRESSIONS323 - Table &1: Complex table structure not supported for mail recipients ?

  The SAP error message FDT_EXPRESSIONS323 indicates that there is an issue with the structure of a table being used in a context where it is not supported, specifically for mail recipients. This error typically arises when trying to send emails or notifications using a complex table structure that the system cannot process.
  Cause:
  The error is caused by the use of a complex table structure that includes nested tables or non-standard data types. The system expects a simpler structure for mail recipients, and when it encounters a complex structure, it raises this error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Simplify the Table Structure: Review the table structure being used and ensure that it is not overly complex. Flatten the structure if possible, removing any nested tables or complex data types.
  
  
  Use Standard Data Types: Ensure that the fields in the table are using standard data types that are supported by the mail functionality in SAP.
  
  
  Check Configuration: Verify the configuration settings related to the mail sending process. Ensure that the settings are appropriate for the data being processed.
  
  
  Debugging: If you have access to the development environment, you can debug the process to identify exactly where the error is occurring. This may provide insights into what specific part of the table structure is causing the issue.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific version you are using. There may be specific guidelines or limitations regarding the use of tables in mail recipients.
  
  
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support for assistance. They may have additional insights or patches available for your specific situation.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions.
  Documentation: Review the official SAP documentation for the module you are working with, as it may contain specific guidelines on data structures and mail functionalities.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.