How To Fix DMC_MDS_MAINT_EVENT178 - Call of method &1 of class &2 failed due to parameter type mismatch

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_MDS_MAINT_EVENT - message class for dynamic maint event proc

• Message number: 178

• Message text: Call of method &1 of class &2 failed due to parameter type mismatch

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_MDS_MAINT_EVENT178 - Call of method &1 of class &2 failed due to parameter type mismatch ?

  The SAP error message DMC_MDS_MAINT_EVENT178 indicates that there is a parameter type mismatch when calling a method in a specific class. This error typically occurs in the context of Data Management and Data Quality processes, particularly when working with Master Data Governance (MDG) or Data Migration Cockpit (DMC) functionalities.
  Cause:
  
  
  Parameter Type Mismatch: The most common cause of this error is that the method being called expects a parameter of a certain type (e.g., string, integer, etc.), but the actual parameter being passed does not match this expected type. This can happen due to:
  
  Incorrect data types being passed from the calling function.
  Changes in the method signature that are not reflected in the calling code.
  Data conversion issues where the data being passed cannot be converted to the expected type.
  
  
  
  Configuration Issues: Sometimes, the error can arise from incorrect configuration settings in the DMC or MDG setup, leading to unexpected behavior during method calls.
  
  
  Custom Code: If there are custom enhancements or modifications in the system, they might not align with the standard method definitions, leading to type mismatches.
  
  
  Solution:
  
  
  Check Method Signature: Review the method signature in the class specified in the error message. Ensure that the parameters being passed match the expected types.
  
  
  Debugging: Use the ABAP debugger to trace the execution flow and identify where the parameter mismatch occurs. Check the values and types of the parameters being passed to the method.
  
  
  Data Validation: Ensure that the data being passed to the method is validated and converted to the correct type before the method call.
  
  
  Review Custom Code: If there are any custom implementations, review them to ensure they are compatible with the standard methods and do not introduce type mismatches.
  
  
  Check Configuration: Review the configuration settings in the DMC or MDG to ensure they are set up correctly and do not lead to unexpected behavior.
  
  
  SAP Notes: Check for any relevant SAP Notes or updates that might address this specific error or provide guidance on resolving it.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the specific classes and methods involved to understand their expected parameters and usage.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed.
  SAP Support: If the issue persists and cannot be resolved through the above steps, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the context in which it occurs.
  
  By following these steps, you should be able to identify and resolve the cause of the DMC_MDS_MAINT_EVENT178 error in your SAP system.