Message type: E = Error
Message class:  O9 - IS-Oil: TD - Scheduling, loading, delivery confirmation 
Message number: 833
Message text: Please select only one delivery item at a time
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 O9833, which states "Please select only one delivery item at a time," typically occurs in the context of processing deliveries, such as during the delivery creation or processing in the SAP system. This error indicates that the system expects the user to select only one delivery item for the operation they are trying to perform, but multiple items have been selected instead.
Cause: Multiple Selections: The most common cause of this error is that the user has selected multiple delivery items when the system only allows for one item to be processed at a time. Transaction Limitations: Certain transactions or functions in SAP are designed to work with a single item to ensure data integrity and proper processing. User Interface Issues: Sometimes, the user interface may allow for multiple selections, but the underlying logic of the transaction does not support it.
Solution: Select a Single Item: Ensure that you only select one
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
O9832 Please select one delivery item
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
O9831 System cannot read Table TOIGE for key &. Contact system administrator
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
O9834 Only deliveries can be selected for exchange assignment
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
O9835 Unexpected document type encountered. Inform system administrator
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.