How To Fix PP_MRP_ODATA020 - Cannot change values of new proposal; value has the wrong line type

SAP Error Message - Details

• Message type: E = Error

• Message class: PP_MRP_ODATA - OData Services for MRP/MRP Cockpit

• Message number: 020

• Message text: Cannot change values of new proposal; value has the wrong line type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PP_MRP_ODATA020 - Cannot change values of new proposal; value has the wrong line type ?

  The SAP error message PP_MRP_ODATA020 typically occurs in the context of Material Requirements Planning (MRP) when there is an attempt to change values in a new proposal that are not compatible with the expected data types or line types. This error can arise in various scenarios, such as during the execution of MRP runs, when processing planned orders, or when using OData services to manipulate MRP data.
  Cause:
  
  Data Type Mismatch: The values being submitted for change may not match the expected data types for the fields in the proposal. For example, if a numeric field is expected but a string is provided, this error can occur.
  Incorrect Line Type: The line type of the proposal may not allow for changes to certain fields. For instance, if the proposal is of a type that is read-only or not editable, attempting to change it will trigger this error.
  OData Service Issues: If you are using OData services to interact with MRP data, there may be issues with the service configuration or the way the data is being sent to the service.
  
  Solution:
  
  Check Data Types: Ensure that the values you are trying to change match the expected data types for the fields. Review the data model and confirm that the data being sent is in the correct format.
  Review Line Types: Verify the line type of the proposal you are trying to modify. If it is a read-only line type, you will not be able to change its values. You may need to create a new proposal or modify a different line type that allows changes.
  OData Configuration: If using OData services, check the service configuration and ensure that the correct entity sets and properties are being used. Validate the request payload to ensure it adheres to the expected structure.
  SAP Notes and Documentation: Check for any relevant SAP Notes or documentation that may address this specific error. SAP frequently updates its knowledge base with solutions for common issues.
  
  Related Information:
  
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  SAP Help Portal: Refer to the SAP Help Portal for detailed documentation on MRP processes and OData services.
  Transaction Codes: Familiarize yourself with relevant transaction codes (e.g., MD01 for MRP run, MD04 for stock/requirements list) that may help in diagnosing the issue further.
  
  If the problem persists after checking these areas, it may be beneficial to consult with your SAP support team or a technical consultant who can provide deeper insights into the specific configuration and data involved in your scenario.