Message type: E = Error
Message class:  BM - Development class BZME - units of measure 
Message number: 313
Message text: Dimension & is not defined
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The SAP error message BM313, which states "Dimension & is not defined," typically occurs in the context of SAP Business Warehouse (BW) or SAP Business Planning and Consolidation (BPC) when there is an issue with the data model or the configuration of dimensions in your planning or reporting environment.
Cause: Missing Dimension Definition: The dimension referenced in the error message is not defined in the system. This could happen if the dimension was deleted or not created properly. Incorrect Configuration: The dimension might not be correctly configured in the InfoObject or the planning model. Transport Issues: If the system has recently undergone a transport of objects, the dimension may not have been included or properly activated in the target system. Data Source Issues: The data source from which the dimension is being pulled may not be correctly set up or may not include the required dimension.
Solution: Check Dimension Definition: Go to the relevant transaction (like RSA1
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