How To Fix W_CB012 - &1 is not a table/structure. Field name must remain initial

SAP Error Message - Details

• Message type: E = Error

• Message class: W_CB -

• Message number: 012

• Message text: &1 is not a table/structure. Field name must remain initial

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message W_CB012 - &1 is not a table/structure. Field name must remain initial ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message: W_CB012 &1 is not a table/structure. Field name must remain initial
  
  Cause:
  This error occurs during ABAP program generation or runtime when the system expects a table or structure but instead finds a data object that is not a table or structure. The message typically appears when:
  
  You try to access a field of a variable that is not defined as a structure or table.
  The program or tool expects a complex data type (structure or internal table) but receives a simple data type (like elementary data types: I, C, N, D, etc.).
  The field name is not initial (empty) but the parent object is not a structure/table, so the system cannot resolve the field.
  
  The placeholder &1 in the message is replaced by the name of the variable or object that is incorrectly used.
  
  Explanation:
  
  In ABAP, when you want to access a component of a structure or a line of an internal table, the variable must be declared as a structure or table type.
  If you try to access a component of a simple data type (e.g., my_var-field where my_var is an integer), the system throws this error.
  The phrase "Field name must remain initial" means that if the variable is not a structure or table, you cannot specify a field name after it.
  
  
  Example Scenario:
  DATA: lv_num TYPE i.
  WRITE lv_num-field. " This will cause W_CB012 because lv_num is not a structure
  
  Solution:
  
  
  Check the data type of the variable &1:
  
  Ensure that the variable is declared as a structure or internal table if you want to access its fields or lines.
  
  
  
  Correct the field access:
  
  If the variable is a simple type, do not try to access fields or components.
  If you need to access fields, declare the variable as a structure or use an appropriate data type.
  
  
  
  Review the program logic:
  
  Sometimes, the error occurs due to a typo or incorrect variable usage.
  Verify that the variable used is the correct one and has the expected data type.
  
  
  
  If the error occurs during program generation or code transformation:
  
  Check the source of the code generation or transformation logic.
  Make sure the metadata or dictionary objects used are correct and consistent.
  
  
  
  
  Related Information:
  
  Message Class: W_CB012 is a warning message from the ABAP runtime or code generation environment.
  Common contexts: 
  
  When using dynamic programming or field-symbols.
  When working with generic data references.
  During code generation or transformation in tools like SAP BW, SAP PI/PO, or custom code generators.
  
  
  SAP Notes: Search for SAP Notes related to W_CB012 for specific patches or updates if this occurs in standard SAP code or tools.
  Debugging tips:
  
  Use the ABAP debugger to check the data type of the variable at runtime.
  Use DESCRIBE FIELD or TYPE statements to verify the type.
  
  
  
  
  If you provide the specific code snippet or context where this error occurs, I can help you with a more precise solution.