How To Fix FRMLDLG299 - Primary output is a stream; function cannot be executed

SAP Error Message - Details

• Message type: E = Error

• Message class: FRMLDLG - RMS-FRM: Dialog Messages for Formula

• Message number: 299

• Message text: Primary output is a stream; function cannot be executed

What causes this issue?

You tried to transfer the data calculated for a stream to the property
tree of the primary output. However, the data is only transferred to the
property tree of the primary output if it is specification data.

System Response

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

How to fix this error?

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 FRMLDLG299 - Primary output is a stream; function cannot be executed ?

  The SAP error message FRMLDLG299 indicates that there is an issue with the primary output of a function module or a form that is expected to return a specific type of data, but instead, it is returning a stream. This typically occurs in the context of SAP Smart Forms or SAPscript when the output format does not match the expected data type.
  Cause:
  
  Output Type Mismatch: The function or form is designed to return a specific type of output (like a table or a structure), but it is instead returning a stream (like a binary or text stream).
  Incorrect Configuration: The configuration of the form or function module may not be set up correctly, leading to the output being treated as a stream.
  Data Handling Issues: There may be issues in how the data is being processed or passed to the function, causing it to be interpreted incorrectly.
  
  Solution:
  
  Check Output Type: Review the function module or Smart Form to ensure that the output type is correctly defined. Make sure that the expected output matches the actual output.
  Adjust Form Settings: If you are using Smart Forms, check the settings in the form to ensure that the output is configured correctly. Look for any settings that might be causing the output to be treated as a stream.
  Debugging: Use the debugger to step through the function/module to see where the output is being generated and how it is being processed. This can help identify where the mismatch is occurring.
  Review Data Types: Ensure that the data types being passed to the function or form are compatible with what is expected. If necessary, convert the data to the appropriate type before passing it.
  Consult Documentation: Refer to SAP documentation or notes related to the specific function or form you are using. There may be known issues or additional configuration steps required.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific function or Smart Form you are using.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Testing: After making changes, thoroughly test the function or form to ensure that the issue is resolved and that the output is as expected.
  
  If the problem persists after trying these solutions, it may be beneficial to reach out to SAP support for further assistance.