How To Fix WXP156 - Select one line only in the list

WXP156 - Overview

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 156

• Message text: Select one line only in the list

What causes this issue?

You have chosen a function that only requires one argument. You can
specify this by selecting one line in the relevant list.
When the function was called, either no lines or multiple lines were
selected and thus the function was not specified clearly enough.
If the list contains one line only, it is used to specify the argument
for your function.

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?

Select one line only in the relevant list and call the function once
again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WXP156 - Select one line only in the list ?

  Certainly! Here's detailed information about the SAP error message WXP156 - "Select one line only in the list":
  
  Error Message:
  WXP156 - Select one line only in the list
  
  
  Cause:
  This error occurs when a user is expected to select exactly one line (one entry) from a list or table in an SAP transaction or report, but:
  
  No line is selected, or
  More than one line is selected.
  
  The program or function module requires a single, unambiguous selection to proceed, and multiple or zero selections violate this requirement.
  
  When does it typically occur?
  
  When processing lists in SAP Web Dynpro applications.
  When using selection screens or ALV (ABAP List Viewer) grids where single selection mode is enforced.
  In transactions or custom programs where the logic expects exactly one item to be chosen for further processing.
  
  
  
  Solution:
  
  
  Select exactly one line:
  
  Review the list or table displayed.
  Make sure to select only one entry (row).
  If multiple lines are selected, deselect all but one.
  If no line is