Message type: E = Error
Message class:  V2 - Kopierfunktionen der Verkaufsbelegbearbeitung 
Message number: 027
Message text: You can only carry out selection for an order or sales document
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 V2027 ("You can only carry out selection for an order or sales document") typically occurs in the context of sales and distribution (SD) when a user attempts to perform an action that is not allowed for the current context or document type. This error is often related to the selection criteria used in transactions involving sales orders, delivery documents, or billing documents.
Cause:
Incorrect Document Type: The action you are trying to perform is only valid for specific document types (e.g., sales orders or delivery documents). If you are trying to perform this action on a document type that does not support it, you will encounter this error.
Selection Criteria: The selection criteria you are using may not be appropriate for the document type you are working with. For example, if you are trying to select a billing document when the system expects a sales order, this error can
Get instant SAP help. Sign up for our Free Essentials Plan. 
V2026 Order & has not been assigned to a sales document
What causes this issue?  The system could not determine an SD document item in order &v1&System Response  The system does not allow you to bil...
V2025 No items to be billed have been selected (check entries)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
V2028 No account assignment object (cost collector or project) determined
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
V2029 For period billing date use rule with base line date = billing date
What causes this issue?  Use the baseline date = billing date rule for the billing date period.How to fix this error?  Maintain the rule in Customizin...
Click on this link to search all SAP messages.