How To Fix WL473 - Workflow & arithmetic operation step &: '&' or '&' is not a number

WL473 - Overview

• Message type: E = Error

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

• Message number: 473

• Message text: Workflow & arithmetic operation step &: '&' or '&' is not a number

What causes this issue?

One of the two operands of an arithmetic operation is not a number.

System Response

See above.

How to fix this error?

Correct the related workflow definition or binding definition so that
numbers are also available for the arithmetic operation. Particular
care is required with variables of type NUMC.

Error message extract from SAP system. Copyright SAP SE.

WL473 - Details

• The SAP error message WL473 indicates that there is an issue with an arithmetic operation in a workflow, specifically that one of the operands involved in the operation is not a valid number. This can occur in various scenarios, such as when trying to perform calculations or comparisons in a workflow step.
  
  Cause:
  
  Invalid Data Type: The variable or field being used in the arithmetic operation is not of a numeric type. For example, it might be a string or a null value.
  Data Initialization: The variable may not have been initialized properly, leading to it being empty or containing unexpected characters.
  Workflow Logic: There may be a logical error in the workflow where the expected numeric values are not being passed correctly.
  Data Source Issues: If the data is being fetched from a database or external source, there may be issues with the data integrity or format.
  
  
  Solution:
  
  Check Variable Types: Ensure that all variables involved