Message type: E = Error
Message class:  /SAPNEA/J_SC -  
Message number: 878
Message text: Material Ledger and SCC cannot be activated together
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 error message /SAPNEA/J_SC878 in SAP indicates that the Material Ledger (ML) and the Supply Chain Cockpit (SCC) cannot be activated simultaneously. This is a common issue that arises when there are conflicting settings or configurations in the SAP system.
Cause: Conflicting Configuration: The Material Ledger and Supply Chain Cockpit are both advanced functionalities in SAP that manage inventory and supply chain processes. However, they have overlapping functionalities, and activating both can lead to conflicts. System Settings: The system may have been configured to use one of these functionalities, and attempting to activate the other without proper adjustments can trigger this error. Version Compatibility: In some cases, the version of SAP you are using may not support the simultaneous activation of both features.
Solution: Decide on Functionality: Determine whether you need the Material Ledger or the Supply Chain Cockpit. If you only need one, deactivate the other. If you choose to use the Material Ledger, ensure that
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SAPNEA/J_SC877 OBEW postings are not allowed in Material Ledger active valuation area &
What causes this issue?  Subcontracting with chargeable components is not supported in a Material ledger active valuation area.System Response  The sy...
/SAPNEA/J_SC876 Material Ledger active in valution area &. Price change not supported
What causes this issue?  Price change of  entries in Valuated Stock with Subcontractor not supported in a material ledger active valuation area. Subco...
/SAPNEA/J_SC879 Valuation area & 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...
/SAPNEA/J_SC880 None of the import parameters filled when calling up module &
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.