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

SAP Error Message - Details

• 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.