How To Fix W9017 - Choose a function

SAP Error Message - Details

• Message type: E = Error

• Message class: W9 - IS-R: External messages POS system

• Message number: 017

• Message text: Choose a function

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message W9017 - Choose a function ?

  SAP Error Message:
  
  W9017 - Choose a function
  
  Cause:
  The message W9017 "Choose a function" typically appears when a user is expected to select or specify a function or action in a particular SAP screen or transaction, but no valid function has been chosen. This often happens in custom or standard SAP programs where the system prompts the user to pick an option (e.g., a menu function, a processing option, or a function code) before proceeding.
  In other words, the system is waiting for the user to select a function to continue, but the user has not done so.
  
  When does it occur?
  
  When a screen or dialog requires the user to select a function code (e.g., from a list of buttons or menu options) and none is selected.
  In custom reports or transactions where function codes are used to control flow, and the user input is missing or invalid.
  Sometimes in batch input sessions or variants where a function code is expected but not provided.
  
  
  Solution:
  
  
  Select a Function:
  
  On the screen where the message appears, choose one of the available functions or options. This could be a button, menu item, or a function code input field.
  
  
  Check User Input:
  
  Ensure that the input field or selection area for the function is not left blank.
  
  
  Review Custom Code (if applicable):
  
  If this message appears in a custom program or transaction, check the code logic that handles function codes (usually in the AT USER-COMMAND event or similar). Make sure the function codes are correctly defined and that the program handles the case when no function is selected.
  
  
  Check GUI Elements:
  
  Sometimes, GUI elements (buttons, menus) might not be visible or enabled due to authorization or screen variants. Verify that the user has the necessary authorizations and that the screen is correctly configured.
  
  
  Debugging:
  
  If unsure, debug the program to see where the function code is expected and why it is missing.
  
  
  
  Related Information:
  
  
  Function Codes in SAP:
  
  SAP uses function codes (e.g., 'BACK', 'EXIT', 'SAVE', 'EXECUTE') to control user actions on screens. These are usually triggered by buttons or menu options.
  
  
  Message Class W9:
  
  The message number 017 in message class W9 is a standard warning message prompting the user to choose a function.
  
  
  User Commands:
  
  In ABAP, user commands are processed in the AT USER-COMMAND event. If no function code is passed, the program might raise this warning.
  
  
  Authorization Checks:
  
  Sometimes, missing authorizations can hide or disable function buttons, leading to this message.
  
  
  
  Summary:
  
  Cause: No function selected when the system expects one.
  Solution: Select a valid function or option on the screen; check program logic if custom.
  Additional: Verify authorizations and screen configuration if the issue persists.
  
  
  If you provide the transaction or program context where this message appears, I can give more specific guidance.