How To Fix /MVA/AMT_SERVICE002 - Serious error while assigning ExtensionOut to exp.parameter (type: &1)

SAP Error Message - Details

• Message type: E = Error

• Message class: /MVA/AMT_SERVICE -

• Message number: 002

• Message text: Serious error while assigning ExtensionOut to exp.parameter (type: &1)

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 /MVA/AMT_SERVICE002 - Serious error while assigning ExtensionOut to exp.parameter (type: &1) ?

  The SAP error message /MVA/AMT_SERVICE002 Serious error while assigning ExtensionOut to exp.parameter (type: &1) typically indicates an issue related to the assignment of an output parameter in a service interface or a related extension in the context of SAP's Advanced Message Processing (AMP) or similar frameworks.
  Cause:
  
  Data Type Mismatch: The error often arises due to a mismatch in the expected data type of the output parameter. The system is trying to assign a value to a parameter that does not match the expected type.
  Configuration Issues: There may be misconfigurations in the service interface or the related extension settings.
  Missing or Incorrect Mapping: If the mapping between the input and output parameters is not correctly defined, it can lead to this error.
  Code Issues: If there is custom code involved, there might be bugs or logical errors in the implementation.
  
  Solution:
  
  Check Data Types: Verify that the data types of the output parameters match the expected types defined in the service interface. Ensure that the data being assigned is compatible.
  Review Configuration: Go through the configuration settings of the service interface and any related extensions to ensure they are set up correctly.
  Mapping Verification: Check the mapping of input and output parameters to ensure that they are correctly defined and that there are no missing mappings.
  Debugging: If you have access to the code, use debugging tools to trace the execution and identify where the error occurs. Look for any logical errors or exceptions being thrown.
  Consult Documentation: Refer to SAP documentation or notes related to the specific service or module you are working with for any known issues or additional troubleshooting steps.
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it is a production issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide patches.
  Transaction Codes: Familiarize yourself with transaction codes related to service interfaces, such as SOAMANAGER, which can help in managing web services and their configurations.
  Community Forums: Look for discussions in SAP community forums or platforms like SAP Community, where other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution.