How To Fix DT184 - Field &-&: Table type & is a generic type

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 184

• Message text: Field &-&: Table type & is a generic type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT184 - Field &-&: Table type & is a generic type ?

  The SAP error message DT184 indicates that there is an issue with the use of a generic table type in your ABAP program or function module. This error typically arises when you are trying to use a generic table type in a context where a specific table type is expected.
  Cause:
  
  Generic Table Type: The error occurs because the table type you are trying to use is defined as a generic type (e.g., TABLE OF ANY TYPE or TABLE OF STRING) rather than a specific type (e.g., TABLE OF ZMY_STRUCTURE).
  Type Mismatch: The context in which you are trying to use the generic table type does not support it. For example, if you are trying to pass a generic table type to a function module or method that expects a specific table type, this error will occur.
  
  Solution:
  
  
  Define a Specific Table Type: Instead of using a generic table type, define a specific table type that corresponds to the structure you are working with. For example, if you are working with a structure ZMY_STRUCTURE, you can define a table type as follows:
  TYPES: BEGIN OF ty_my_structure,
           field1 TYPE string,
           field2 TYPE i,
         END OF ty_my_structure.
  
  TYPES: tt_my_structure TYPE TABLE OF ty_my_structure.
  
  
  Change the Function Module/Method Signature: If you are calling a function module or method, ensure that the parameter types match. If the function expects a specific table type, make sure to pass a variable of that specific type.
  
  
  Check Data Declarations: Review your data declarations to ensure that you are not inadvertently using a generic type where a specific type is required.
  
  
  Related Information:
  
  ABAP Data Types: Understanding the difference between generic and specific data types in ABAP is crucial. Generic types are flexible but can lead to issues when strict type checking is enforced.
  Function Module Documentation: Always refer to the documentation of the function modules or methods you are using to understand the expected parameter types.
  Debugging: Use the ABAP debugger to trace the point where the error occurs, which can help you identify the specific variable or parameter causing the issue.
  
  By addressing the use of generic types and ensuring that you are using specific types where required, you should be able to resolve the DT184 error in your SAP environment.