How To Fix SMT078 - Type of parameter &1 is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: SMT -

• Message number: 078

• Message text: Type of parameter &1 is not supported

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 SMT078 - Type of parameter &1 is not supported ?

  The SAP error message SMT078, which states "Type of parameter &1 is not supported," typically occurs in the context of SAP's Smart Forms or when dealing with certain function modules or BAPIs that involve parameter handling. This error indicates that the type of parameter being passed to a function or form is not recognized or is not compatible with what is expected.
  Causes:
  
  Unsupported Data Type: The parameter type being used is not supported by the function module or Smart Form. This can happen if you are trying to pass a complex data type or a type that is not defined in the expected format.
  Incorrect Parameter Mapping: The parameters being passed may not match the expected types defined in the function module or Smart Form.
  Version Compatibility: If you are using an older version of SAP or a specific module, it may not support certain data types that are available in newer versions.
  Custom Development Issues: If there are custom developments involved, the data types defined in the custom code may not align with the standard SAP expectations.
  
  Solutions:
  
  Check Parameter Types: Review the function module or Smart Form to ensure that the parameter types you are passing match the expected types. You can do this by checking the documentation or the parameter definitions in the function module.
  Use Supported Data Types: If you are using a custom or complex data type, consider converting it to a simpler, supported type (e.g., using basic types like CHAR, NUMC, etc.).
  Debugging: Use the debugger to trace the execution and identify the exact point where the error occurs. This can help you understand which parameter is causing the issue.
  Review Custom Code: If the error arises from custom code, review the data types defined in the custom development and ensure they are compatible with the standard SAP types.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide guidance on supported parameter types.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the specific function module or Smart Form you are working with to understand the expected parameter types.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Transaction Codes: Use transaction codes like SE37 (Function Builder) or SMARTFORMS (for Smart Forms) to analyze the parameters and their types.
  
  By following these steps, you should be able to identify the cause of the SMT078 error and implement a suitable solution.