How To Fix R7770 - Too many characteristics (&2) are assigned to dimension &1

SAP Error Message - Details

• Message type: E = Error

• Message class: R7 - BW: Data basis

• Message number: 770

• Message text: Too many characteristics (&2) are assigned to dimension &1

What causes this issue?

Too many characteristics were assigned to the specified dimension.
The database table to be created for a dimension of a "normal" InfoCube
may not contain more than 249 fields. You therefore may assign a maximum
of 248 characteristics.
If, however, the property <LS>DIMID's </>was defined one-to-one for an
InfoCube, a <LS>unique index</> is created on the characteristics of the
dimension. In this case you can assign a maximum of 16 characteristics
for each dimension.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Assign individual characteristics to another dimension or to a new
dimension so that the above limit is not exceeded.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message R7770 - Too many characteristics (&2) are assigned to dimension &1 ?

  The SAP error message R7770, which states "Too many characteristics (&2) are assigned to dimension &1," typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when there are too many characteristics assigned to a single dimension in a data model or InfoObject. This can lead to performance issues and is subject to system limitations.
  Cause:
  
  Exceeding Limits: Each dimension in SAP BW has a limit on the number of characteristics that can be assigned to it. When this limit is exceeded, the system generates the R7770 error.
  Model Design: Poor design of the data model can lead to an excessive number of characteristics being assigned to a single dimension.
  Data Volume: High data volume and complexity can exacerbate the issue, especially if many characteristics are being used in queries or reports.
  
  Solution:
  
  Review Dimension Design: Analyze the design of the dimension and consider whether all assigned characteristics are necessary. If some characteristics can be removed or consolidated, do so.
  Create Additional Dimensions: If certain characteristics are essential but exceed the limit, consider creating additional dimensions to distribute the characteristics more evenly.
  Optimize Queries: Review the queries that utilize this dimension and see if they can be optimized to reduce the number of characteristics being used at once.
  Check System Settings: Ensure that your system settings are optimized for performance and that you are not hitting any other system limitations.
  Consult Documentation: Refer to SAP documentation for specific limits related to dimensions and characteristics in your version of SAP BW or HANA.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or updates related to this error.
  Performance Tuning: Consider performance tuning best practices for SAP BW or HANA to improve overall system efficiency.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered and resolved similar issues.
  Training and Resources: If you are frequently encountering design issues, consider additional training on data modeling in SAP BW or HANA.
  
  By addressing the root cause of the error and optimizing your data model, you can resolve the R7770 error and improve the performance of your SAP BW or HANA environment.