How To Fix WL366 - Result of operation '& & &' is a time; type '&' not allowed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 366

• Message text: Result of operation '& & &' is a time; 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 WL366 - Result of operation '& & &' is a time; type '&' not allowed ?

  The SAP error message WL366, which states "Result of operation '& & &' is a time; type '&' not allowed," typically occurs in the context of ABAP programming or when working with time-related data types in SAP. This error indicates that there is an issue with the data types being used in an operation, particularly when dealing with time values.
  Cause:
  The error is caused by attempting to perform an operation that involves incompatible data types. Specifically, it suggests that the operation is trying to use a time data type in a context where it is not allowed or expected. This can happen in various scenarios, such as:
  
  Arithmetic Operations: Trying to perform arithmetic operations (like addition or subtraction) on time data types directly.
  Type Mismatch: Using a time data type in a place where a different data type (like a numeric or character type) is expected.
  Function Module or Method Calls: Passing a time data type to a function module or method that does not accept it.
  
  Solution:
  To resolve the WL366 error, you can take the following steps:
  
  
  Check Data Types: Review the data types of the variables involved in the operation. Ensure that you are not trying to perform operations on incompatible types.
  
  
  Convert Data Types: If you need to perform arithmetic operations involving time, consider converting the time data type to a compatible format (like seconds or minutes) before performing the operation. You can use ABAP functions to convert time to a numeric format.
  
  
  Use Appropriate Functions: If you are working with time calculations, use appropriate ABAP functions or methods designed for time manipulation. For example, use TIME_TO_SEC to convert time to seconds for calculations.
  
  
  Debugging: If you are unsure where the error is occurring, use the ABAP debugger to step through the code and identify the exact line causing the issue.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific functions or operations you are using to ensure they are being used correctly with the appropriate data types.
  
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the different data types in ABAP, especially those related to time (TIME, TIMESTAMP, etc.).
  Arithmetic Operations in ABAP: Understand how arithmetic operations work in ABAP and the rules regarding data type compatibility.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to the WL366 error.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.