Message type: E = Error
Message class:  WAO_TRANSFER_PRICES - Messages for the Transfer Prices Web Add-On 
Message number: 004
Message text: Enter the plant
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.
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.
The SAP error message WAO_TRANSFER_PRICES004 typically occurs in the context of transfer pricing or intercompany transactions when the system requires a plant to be specified but it has not been provided. This error is common in scenarios involving material movements, inventory management, or financial postings where a plant is a necessary parameter.
Cause: The error is triggered when: A transaction is being processed that requires a plant code, but the plant field is left blank. The system is unable to determine the relevant plant for the transaction based on the provided data.
Solution: To resolve the error, you can take the following steps: Check the Transaction Data: Ensure that the plant field is filled in the transaction you are trying to process. This could be in a sales order, purchase order, or any other relevant document. Enter the Plant: If the plant field is blank, enter the appropriate plant code that corresponds to the transaction. The plant code
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
WAO_TRANSFER_PRICES003 Material &1 is not assigned to a plant
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
WAO_TRANSFER_PRICES002 No master record exists for material &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
WAO_TRANSFER_PRICES005 Material &1 is not available in plant &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
WAO_TRANSFER_PRICES006 Material &1 could not be transferred into the internal format
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.