How To Fix W8152 - Expression & only allows single-line values

W8152 - Overview

• Message type: E = Error

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

• Message number: 152

• Message text: Expression & only allows single-line values

What causes this issue?

You have tried to create another line for element &V1&.
There are elements in a container which are single-line by definition
and which are multi-line by definition. Element &V1& has been defined
as single-line and therefore can only be assigned a single-line value.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

W8152 - Details

• SAP Error Message:
  W8152 - Expression & only allows single-line values
  
  
  Cause:
  This warning message occurs when an expression or a condition in an SAP program or query expects a single-line value, but a multi-line or multi-value input is provided instead. Essentially, the system expects a scalar (single-line) value, but the input contains multiple lines or entries.
  Common scenarios include:
  
  Using a variable or field that contains multiple lines (e.g., internal table or multiline string) where only a single-line string is allowed.
  In selection screens or dynamic WHERE clauses, passing a range or multiple values where only a single value is expected.
  In ABAP code, when concatenating or comparing fields, or in expressions where only single-line fields are valid.
  
  
  
  Solution:
  
  Check the input data: Ensure that the variable or field used in the expression contains only a single line or single value.
  Adjust the data type: If the variable is an internal table or multiline string, convert or select only