Message type: E = Error
Message class:  MI - Customizing for the Material Master 
Message number: 571
Message text: Indicator for reference materials set in client &
You have allowed the use of particular reference materials such as a
pricing reference material or reference material for consumption. The
indicators for these materials have been set in Customizing table
T130S.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
If you do not use certain reference materials in your system, we
recommend cancelling the indicators for them since this will improve
performance. The system will then automatically hide the fields
concerned in the material master.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message MI571 indicates that there is an issue with the indicator for reference materials set in the client. This error typically arises when the system is unable to find or recognize the reference material indicator in the configuration settings for the client.
Cause: Missing Configuration: The reference material indicator may not be configured correctly in the client settings. Client-Specific Settings: The settings for reference materials may not be activated or may be incorrectly set for the specific client you are working in. Authorization Issues: There may be authorization issues preventing the user from accessing the necessary settings or data related to reference materials. Data Inconsistencies: There could be inconsistencies or missing data in the material master records that are supposed to be linked to the reference materials.
Solution: Check Configuration: Go to the configuration settings in SAP (transaction code SPRO). Navigate to the relevant section for material management and check the settings for reference materials. Ensure that
Get instant SAP help. Sign up for our Free Essentials Plan. 
MI570 Important indicators could not be set for client &
What causes this issue?  You wanted to allow the use of particular reference materials such as a pricing reference material or reference material for ...
MI569 & have already been used; the indicator cannot be cancelled
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
MI572 Screen reference is for industry; choose an industry screen sequence
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
MI573 Screen reference is for retail; choose a retail screen sequence
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.