How To Fix WL367 - Result of operation '& & &' is a date; type '&' not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 367

• Message text: Result of operation '& & &' is a date; type '&' not allowed

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Only the following operations are permitted with date/time:
'date - date' returns an integer
'date - number' returns a date
'time - number' returns a time
'time - time' returns an integer
The result of any calculation or assignment must be type-compatible
with the operand(s) and may not lead to an overflow, i.e. the result
element must be large enough when selected.
The following abbreviations are used in the message:
'I': integers (ABAP data type: Int1, Int2, Int4)
'P': packed numbers with decimal places and signs (Dec, Packed)
'N': character string with numerical values (Numc)
'C': character strings (Character)
'D': date
'T': time
'O' or 'o': objects from the Business Object Repository

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WL367 - Result of operation '& & &' is a date; type '&' not allowed ?

  The SAP error message WL367 indicates that there is an issue with a date operation in your ABAP code or configuration. Specifically, it suggests that the result of an operation is a date, but the type being used is not compatible with a date type. This can occur in various scenarios, such as when performing calculations or comparisons involving date fields.
  Cause:
  
  Type Mismatch: The operation is trying to assign or manipulate a date value using a variable that is not of the date type. For example, you might be trying to perform arithmetic operations on a date field with a numeric or character variable.
  Incorrect Data Types: The data types of the variables involved in the operation are not compatible. For instance, if you are trying to add a number to a date, this will lead to a type mismatch.
  Function Module or Method Issues: If you are using a function module or method that expects a date type but is being passed a different type, this error can occur.
  
  Solution:
  
  Check Variable Types: Review the data types of the variables involved in the operation. Ensure that any variable that is expected to hold a date is declared as a date type (e.g., DATS in ABAP).
  Type Conversion: If you need to perform operations that involve different types, consider converting the types appropriately. For example, if you need to add days to a date, ensure you are using a numeric type for the number of days and that the date variable is correctly defined.
  Debugging: Use the ABAP debugger to step through the code and identify where the type mismatch is occurring. This can help you pinpoint the exact line of code that is causing the error.
  Review Function Calls: If the error arises from a function module or method, check the documentation to ensure you are passing the correct types as parameters.
  
  Related Information:
  
  Data Types in ABAP: Familiarize yourself with the different data types in ABAP, especially DATS for dates, CHAR for characters, and NUMC for numeric values.
  Date Operations: Understand how to perform date arithmetic in ABAP, such as adding days to a date using the ADD_DAYS function or similar methods.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message, as there may be specific fixes or recommendations provided by SAP.
  
  By addressing the type mismatch and ensuring that all variables are correctly defined and used, you should be able to resolve the WL367 error.