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

SAP Error Message - Details

• 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.

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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 are passed correctly.
  
  
  
  Review Documentation:
  
  Check the documentation or help for the transaction or program to identify which parameters are mandatory.
  Sometimes, the error message is accompanied by a list of missing parameters.
  
  
  
  Check User Exits or Enhancements:
  
  If the error occurs in a customized scenario, check user exits, BADIs, or enhancements that might require additional parameters.
  
  
  
  SAP Notes and Support:
  
  Search SAP Notes for WER159 or related to the specific transaction or program.
  Sometimes, patches or corrections are available if this is a known issue.
  
  
  
  
  Related Information:
  
  Message Class: WER (usually related to workflow or parameter validation)
  Typical Context: Workflow processing, report selection screens, function module calls.
  Transaction Codes: Can appear in various transactions depending on context.
  Debugging Tips:  
  
  Use transaction SE91 to look up message WER159 for more details.
  Use SE37 or SE80 to check function modules or programs involved.
  Check the parameter attributes in the ABAP code (look for OBLIGATORY keyword).
  
  
  
  
  Summary:
  WER159 indicates that the system expects certain mandatory input parameters that have not been provided. To resolve it, ensure all required fields are filled, verify parameter passing in custom code, and consult SAP documentation or notes for specific guidance related to the transaction or program in use.