Message type: E = Error
Message class:  /BOFU/FBI_DT_VIEW -  
Message number: 013
Message text: UI mapper class not specified
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 /BOFU/FBI_DT_VIEW013 UI mapper class not specified typically occurs in the context of SAP applications that utilize the Business Object Framework (BOF) and the Financial Business Intelligence (FBI) components. This error indicates that the system is unable to find a specified UI mapper class that is necessary for rendering the user interface for a particular view or component.
Cause: Missing Configuration: The UI mapper class may not be configured correctly in the system. This could be due to missing entries in the relevant configuration tables or settings. Transport Issues: If the system has recently undergone a transport of changes, the necessary classes or configurations may not have been transported correctly. Custom Development: If there are custom developments or modifications, the custom UI mapper class may not be implemented or activated properly. System Upgrade: After an upgrade, certain classes or configurations may become obsolete or incompatible.
Solution: Check Configuration: Verify the configuration settings for the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/BOFU/FBI_DT_VIEW012 UI Structure &1 does not have Field &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/BOFU/FBI_DT_VIEW011 UI Structure &1 not found in data dictionary
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/BOFU/FBI_DT_VIEW014 Default UI Mapper Class &1 will be used at runtime
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/BOFU/FBI_DT_VIEW015 UI Mapper Class &1 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.