How To Fix WER167 - Type &1 of paramater &2 is not a valid DDIC type

SAP Error Message - Details

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 167

• Message text: Type &1 of paramater &2 is not a valid DDIC type

Self-Explanatory Message

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• What is the cause and solution for SAP error message WER167 - Type &1 of paramater &2 is not a valid DDIC type ?

  The SAP error message:
  WER167 Type &1 of parameter &2 is not a valid DDIC type
  
  Cause:
  This error occurs when a parameter in a function module, method, or any ABAP interface element is defined with a type that is not a valid Data Dictionary (DDIC) type. In other words, the type assigned to the parameter is either:
  
  A local type (defined in the program but not in the DDIC),
  A type that does not exist in the Data Dictionary,
  Or a type that is not allowed in the context where a DDIC type is mandatory.
  
  SAP requires certain interface parameters (especially in function modules, remote-enabled function modules, or BAPIs) to use only DDIC types to ensure consistency, transportability, and integration with other SAP components.
  
  Solution:
  
  
  Check the parameter type:
  
  Go to the interface (function module, method, or program) where the parameter is defined.
  Identify the parameter &2 mentioned in the error.
  Check the type &1 assigned to this parameter.
  
  
  
  Verify the type in SE11:
  
  Use transaction SE11 to check if the type &1 exists as a DDIC type (Data Element, Structure, Table Type, Domain, or Table).
  If it does not exist, you need to create it or use an existing valid DDIC type.
  
  
  
  Replace local or invalid types:
  
  If the parameter uses a local type (defined with TYPES or TYPES BEGIN OF in the program), replace it with a DDIC type.
  For example, instead of using a local structure, create a structure in SE11 and use that.
  
  
  
  Adjust the interface accordingly:
  
  After replacing the type with a valid DDIC type, activate the object.
  Test the function module or method again.
  
  
  
  
  Related Information:
  
  DDIC types include:
  
  Data Elements
  Structures
  Table Types
  Domains (indirectly via Data Elements)
  
  
  Function modules and BAPIs require DDIC types for parameters to ensure they can be used in RFC calls and other cross-system communications.
  Local types are allowed in reports and programs but not in interfaces that require DDIC types.
  This error is common when converting local types to interfaces or when creating RFC-enabled function modules.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WER167 Type &1 of parameter &2 is not a valid DDIC type
  
  
  Cause
  Parameter uses a type that is not defined in the Data Dictionary (local or invalid type)
  
  
  Solution
  Replace the parameter type with a valid DDIC type defined in SE11
  
  
  Check
  Use SE11 to verify or create the required DDIC type
  
  
  
  
  If you provide the exact parameter name and type, I can help you with more specific instructions.