How To Fix CN749 - Error when generating planned independent requirements

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 749

• Message text: Error when generating planned independent requirements

What causes this issue?

An error occurred when planned independent requirements were being
generated.

System Response

The system does not generate the planned independent requirements.

How to fix this error?

Check the settings in Customizing under demand management for planned
independent requirements. Check, for example, whether the number ranges
for planned independent requirements are set properly by choosing
<DS:CHAP.SIMG_CMMENUOMP0PB>Planned independent requirements</>.
Contact the SAP Hotline.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN749 - Error when generating planned independent requirements ?

  The SAP error message CN749 typically occurs when there is an issue with generating planned independent requirements (PIR) in the context of production planning and control. This error can arise due to various reasons, and understanding the cause is essential for finding an appropriate solution.
  Cause of CN749 Error
  
  Missing Master Data: The error may occur if the necessary master data (like material master, BOM, routing, etc.) is not maintained or is incomplete.
  Incorrect Planning Parameters: If the planning parameters for the material are not set correctly, it can lead to issues in generating PIR.
  Planning Version Issues: The planning version being used may not be valid or may not have been activated.
  Date Issues: If the dates for the planning horizon are not set correctly, it can lead to errors in generating requirements.
  Configuration Issues: There may be configuration issues in the planning settings that prevent the generation of PIR.
  
  Solution Steps
  
  Check Master Data: Ensure that all relevant master data for the material is complete and correctly maintained. This includes checking the material master, BOM, and routing.
  Review Planning Parameters: Verify that the planning parameters for the material are set correctly in the material master (e.g., MRP type, lot size, etc.).
  Validate Planning Version: Check if the planning version being used is valid and activated. You can do this in the planning version settings.
  Examine Dates: Ensure that the planning horizon dates are set correctly and that they encompass the period for which you are trying to generate PIR.
  Configuration Review: Review the configuration settings in the planning area to ensure that they are set up correctly for generating PIR.
  Check Logs and Messages: Look at the detailed logs and messages in the system for any additional information that might help identify the specific issue.
  
  Related Information
  
  Transaction Codes: You may use transaction codes like MD61 (Create Planned Independent Requirements) or MD02 (MRP Run) to check the status of planned independent requirements.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to error CN749.
  Documentation: Refer to SAP documentation for detailed information on planned independent requirements and the configuration settings related to them.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or refer to SAP community forums for further assistance.