Message type: E = Error
Message class:  /SAPAPO/PDEM -  
Message number: 013
Message text: DataSource &1 not found in semantics mapping
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 /SAPAPO/PDEM013 DataSource &1 not found in semantics mapping typically occurs in the context of SAP Advanced Planning and Optimization (APO) when the system is unable to find a specific DataSource in the semantics mapping configuration. This can happen during data extraction or when trying to load data into the APO system.
Cause: Missing DataSource: The DataSource specified in the error message is not defined in the system or is not properly configured. Incorrect Configuration: The semantics mapping for the DataSource may not have been set up correctly, or the DataSource may have been deleted or renamed. Transport Issues: If the DataSource was recently transported from another system, it may not have been properly activated or configured in the target system. Version Mismatch: There may be a version mismatch between the source system and the APO system, leading to the DataSource not being recognized.
Solution: Check DataSource Configuration: Go to the DataSource configuration in the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SAPAPO/PDEM012 Error when writing to delta queue from DataSource &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM011 InfoProvider &1 not found in Customizing for data realignment
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM014 Field &1 not found in DataSource &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/PDEM015 (Close Real Time) InfoPackage &1 not found or contains errors
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.