How To Fix ME844 - Inbound parameter "message type" not specified

SAP Error Message - Details

• Message type: E = Error

• Message class: ME - Purchasing: General Messages

• Message number: 844

• Message text: Inbound parameter "message type" not specified

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ME844 - Inbound parameter "message type" not specified ?

  The SAP error message ME844, which states "Inbound parameter 'message type' not specified," typically occurs in the context of IDoc processing or when working with inbound messages in SAP. This error indicates that the system expects a specific message type to be defined for the inbound processing, but it has not been provided.
  Cause:
  
  Missing Configuration: The message type may not be configured correctly in the IDoc processing settings.
  Incorrect Mapping: The mapping of the inbound parameters may not include the required message type.
  IDoc Structure: The IDoc being processed may not have the necessary segments or fields populated, leading to the absence of the message type.
  Integration Issues: If the IDoc is being sent from an external system, the sending system may not be including the message type in the IDoc.
  
  Solution:
  
  
  Check IDoc Configuration:
  
  Go to transaction WE20 (Partner Profiles) and ensure that the partner profile for the sender is correctly configured to include the message type.
  Verify that the message type is correctly defined in the IDoc type settings.
  
  
  
  Review IDoc Structure:
  
  Use transaction WE60 to check the IDoc documentation and ensure that the message type is defined in the IDoc structure.
  Ensure that the IDoc segments are correctly populated with the required data.
  
  
  
  Check Mapping:
  
  If you are using middleware (like SAP PI/PO), check the mapping configuration to ensure that the message type is being passed correctly from the source to the target.
  
  
  
  Test IDoc Generation:
  
  If the IDoc is generated from an external system, test the IDoc generation process to ensure that the message type is included in the IDoc.
  
  
  
  Debugging:
  
  If the issue persists, consider debugging the inbound processing to identify where the message type is being lost or not set.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific message type and IDoc you are working with for any additional configuration steps or known issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  WE20: Partner Profiles
  WE30: IDoc Types
  WE60: IDoc Documentation
  WE02: IDoc Display
  WE19: IDoc Test Tool
  
  
  
  Message Types: Common message types in SAP include ORDERS, INVOIC, DELORD, etc. Ensure you are using the correct message type for your business process.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  By following these steps, you should be able to identify the cause of the ME844 error and implement a solution to resolve it.