How To Fix W8310 - Operator '&' cannot be used in this position

W8310 - Overview

• Message type: E = Error

• Message class: W8 - Workflow: Expressions, data flow

• Message number: 310

• Message text: Operator '&' cannot be used in this position

What causes this issue?

The syntax check cannot correctly interpret the condition in this form.

How to fix this error?

The logical operators <ZH>AND</> and <ZH>OR</> should not be entered
before an empty row of the condition. When you delete empty lines, the
previous logical operator is also deleted.

Error message extract from SAP system. Copyright SAP SE.

W8310 - Details

• SAP Error Message:
  W8310 Operator '&' cannot be used in this position
  
  
  Cause:
  This warning message occurs when the ampersand (&) operator is used incorrectly in an ABAP statement or expression. In ABAP, the & operator is used for string concatenation, but it must be placed in syntactically correct positions. If the & operator is used where it is not allowed (e.g., in certain expressions, conditions, or in places where concatenation is not expected), the system raises this warning.
  Common scenarios causing this error include:
  
  Using & in a place where only arithmetic or logical operators are allowed.
  Incorrect concatenation syntax, such as missing operands or improper placement.
  Using & inside conditions or expressions where concatenation is not valid.
  Trying to concatenate non-string data types without proper conversion.
  
  
  
  Solution:
  
  
  Check the syntax of the statement where & is used:
  
  Ensure that & is used only for string concatenation.
  Make sure both operands around & are strings or compatible types.
  
  
  
  Correct usage example:
  DATA: lv_str1