How To Fix WER159 - Not all obligatory parameters have been assigned a value

WER159 - Overview

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 159

• Message text: Not all obligatory parameters have been assigned a value

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WER159 - Not all obligatory parameters have been assigned a value ?

  SAP Error Message:
  WER159 - Not all obligatory parameters have been assigned a value
  
  
  Cause:
  This error occurs when a transaction, report, or function module expects certain mandatory (obligatory) input parameters, but one or more of these parameters have not been provided or assigned a value. In other words, the system requires specific input fields to be filled before processing, and these fields are currently empty or missing.
  Common scenarios include:
  
  Missing required fields in selection screens or input forms.
  Program or function module called without all mandatory parameters.
  Custom developments or standard SAP transactions where input validation fails due to missing data.
  
  
  
  Solution:
  
  
  Check Input Fields:
  
  Review the screen or selection criteria where the error occurs.
  Ensure all mandatory fields (usually marked with a check or asterisk) are filled with valid values.
  
  
  
  Debugging (if in development or custom program):
  
  Use the ABAP debugger to identify which parameter(s) are missing.
  Check the parameter list of the function module or report.
  Verify that all obligatory parameters