How To Fix WER165 - Only item fields can be assigned to an output parameter

SAP Error Message - Details

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 165

• Message text: Only item fields can be assigned to an output parameter

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message WER165 - Only item fields can be assigned to an output parameter ?

  Certainly! Here's a detailed explanation for the SAP error message WER165: "Only item fields can be assigned to an output parameter":
  
  Error Message:
  WER165 - Only item fields can be assigned to an output parameter
  
  Cause:
  This error occurs during the configuration or enhancement of output determination in SAP, specifically when defining or assigning output parameters in the output determination procedure.
  
  In SAP's output determination (e.g., for sales documents, purchase orders, delivery documents), output parameters are used to pass data from the application to the output program.
  Output parameters must be assigned only to fields that belong to the item level (line items) of the document.
  If you try to assign a field that belongs to the header level or any other structure (not the item structure) to an output parameter that is defined for item level, SAP throws this error.
  
  In other words, the system enforces that output parameters defined for item-level outputs can only be linked to item fields, not header fields.
  
  When does it typically occur?
  
  When customizing or enhancing output determination procedures (e.g., in transaction NACE or via BRF+).
  When defining or modifying output parameters in the output determination procedure.
  When assigning fields to output parameters incorrectly (mixing header and item fields).
  
  
  Solution:
  
  
  Check the Output Parameter Definition:
  
  Verify whether the output parameter is defined for the item level or header level.
  Output parameters defined for item level must only be assigned item fields.
  
  
  
  Assign Correct Fields:
  
  If the output parameter is for item level, assign only fields from the item structure (e.g., VBAP for sales order items).
  If you need to assign header fields, create or use an output parameter defined for the header level.
  
  
  
  Adjust Output Parameter Level if Needed:
  
  If you mistakenly defined an output parameter at the item level but want to use header fields, change the output parameter to header level.
  Alternatively, create separate output parameters for header and item levels.
  
  
  
  Review the Data Structures:
  
  Check the data dictionary or the relevant structures to confirm which fields belong to header and which belong to item.
  
  
  
  Testing:
  
  After correction, test the output determination to ensure the error no longer occurs.
  
  
  
  
  Additional Information:
  
  Output Determination is a key process in SAP for controlling how documents trigger outputs (print, email, EDI, etc.).
  Output parameters are used to pass data from the application to the output program or form.
  The distinction between header and item level is crucial because outputs can be generated at different levels.
  This error helps maintain data consistency and prevents runtime errors in output processing.
  
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Error
  WER165 - Only item fields can be assigned to an output parameter
  
  
  Cause
  Assigning a non-item (e.g., header) field to an output parameter defined for item level
  
  
  Solution
  Assign only item fields to item-level output parameters; use header-level parameters for header fields
  
  
  Where it occurs
  Output determination configuration/enhancement (e.g., NACE, BRF+)
  
  
  Impact
  Prevents incorrect field assignments that could cause output processing errors
  
  
  
  
  If you need help with a specific transaction or customizing step where this error occurs, please provide more details!