How To Fix M8066 - Sub-item & & & already selected

M8066 - Overview

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 066

• Message text: Sub-item & & & already selected

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.

M8066 - Details

• The SAP error message M8066 ("Sub-item & & & already selected") typically occurs in the context of inventory management or material management when there is an attempt to select a sub-item (such as a batch or serial number) that has already been selected for a particular transaction. This can happen in various scenarios, such as during goods movements, inventory counts, or when processing deliveries.
  
  Cause:
  
  Duplicate Selection: The most common cause of this error is that the sub-item (e.g., batch or serial number) has already been selected for the current transaction or is already in use in another transaction.
  Transaction Locking: The sub-item may be locked by another user or transaction, preventing it from being selected again.
  
  Configuration Issues: There may be configuration settings in the system that are causing unexpected behavior regarding the selection of sub-items.
  
  
  Solution:
  
  Check Selection: Verify if the sub-item you are trying to select is already in use. You can do