Message type: E = Error
Message class:  SXCO - Extension Common: Messages 
Message number: 002
Message text: ATO is not configured.
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 SXCO002: ATO is not configured typically relates to the Advanced Transport Organizer (ATO) in the SAP system. This error indicates that the ATO functionality is not properly set up or configured in your SAP environment.
Cause: Missing Configuration: The ATO feature may not be configured in the system. This can happen if the system was not set up to use ATO or if the configuration was inadvertently removed or not completed. Transport Management System (TMS) Issues: There may be issues with the Transport Management System configuration that prevent ATO from functioning correctly. Authorization Issues: The user may not have the necessary authorizations to access or configure ATO settings.
Solution: Check ATO Configuration: Go to transaction SCC4 and ensure that the ATO is enabled for the client you are working in. Use transaction SE03 to check the transport organizer settings and ensure that ATO is properly configured. Transport Management System (TMS) Configuration: Ensure that the TMS is
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
SXCO001 SQL operation &1 failed with return code &2.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SXCO000 Call to function module &1 failed with return code &2.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SXCO003 Enqueue failed with return code &1.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
SXCO004 Item &1 was not found.
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.