Message type: E = Error
Message class:  /ECRS/BL_TD -  
Message number: 031
Message text: You are not authorized to display purchase orders
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 /ECRS/BL_TD031 You are not authorized to display purchase orders indicates that the user does not have the necessary authorization to view purchase orders in the SAP system. This is a common issue in SAP environments where access control is strictly enforced to protect sensitive data.
Cause: Authorization Issues: The user’s role or profile does not include the necessary authorizations to display purchase orders. Missing Authorization Objects: The required authorization objects related to purchase order display (e.g., M_BEST_BSA, M_BEST_EKO, etc.) are not assigned to the user. Role Assignment: The user may not be assigned to the correct role that includes the necessary permissions for purchase order access.
Solution: Check User Roles: Verify the roles assigned to the user in transaction SU01 (User Maintenance). Ensure that the user has a role that includes the necessary authorizations for displaying purchase orders. Review Authorization Objects: Use transaction SU53 immediately after encountering the error to check which authorization check failed. This
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/ECRS/BL_TD030 You are not authorized to display billing documents
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/ECRS/BL_TD029 Document &1 does not exist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/ECRS/BL_TD032 You are not authorized to display scheduling agreements
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/ECRS/BL_TD033 You are not authorized to display inbound deliveries
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.