How To Fix /SAPAPO/ATP398 - This function can only be called for list items

/SAPAPO/ATP398 - Overview

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 398

• Message text: This function can only be called for list items

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/ATP398 - This function can only be called for list items ?

  The SAP error message /SAPAPO/ATP398 ("This function can only be called for list items") typically occurs in the context of Advanced Planning and Optimization (APO) when a function is being called that is intended to operate on list items, but the current context does not meet that requirement. This can happen in various scenarios, such as during the execution of certain transactions or reports that expect a selection of items but are instead provided with a single item or an inappropriate context.
  
  Cause:
  
  Incorrect Context: The function is being called in a context where it expects a list of items (e.g., multiple materials or orders) but is instead receiving a single item or no items at all.
  Selection Criteria: The selection criteria used in the transaction or report may not be set correctly, leading to the function being unable to find the expected list of items.
  Data Issues: There may be issues with the