How To Fix CM_EHENV_CDEF042 - Sampled data "&1" must be aggregated first when used in nested expression

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_EHENV_CDEF -

• Message number: 042

• Message text: Sampled data "&1" must be aggregated first when used in nested expression

What causes this issue?

The input parameter for the sampled data must be aggregated first when
it is used in a nested expression of an aggregation.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CM_EHENV_CDEF042 - Sampled data "&1" must be aggregated first when used in nested expression ?

  The SAP error message CM_EHENV_CDEF042 indicates that there is an issue with how sampled data is being used in a nested expression within a calculation or query. This error typically arises when you attempt to use a sampled data set that has not been aggregated before being included in a nested expression.
  Cause:
  The error occurs because:
  
  Nested Expressions: You are trying to use a sampled data set directly in a nested expression without first aggregating it. In SAP, certain calculations require that data be aggregated (e.g., summed, averaged) before it can be used in further calculations or expressions.
  Data Context: The context in which the sampled data is being used does not allow for direct usage without aggregation. This is often the case in complex queries or calculations where the system expects a single value rather than a set of values.
  
  Solution:
  To resolve this error, you should:
  
  
  Aggregate the Sampled Data: Before using the sampled data in your nested expression, ensure that you apply an aggregation function (like SUM, AVG, COUNT, etc.) to it. This will convert the sampled data into a single value that can be used in the nested expression.
  For example, if you have a sampled data field SampledData, you might change your expression from:
  NestedExpression(SampledData)
  to:
  NestedExpression(SUM(SampledData))
  
  
  Review the Expression Logic: Ensure that the logic of your expression is correct and that the aggregation aligns with the intended calculation. 
  
  
  Check Documentation: Refer to the SAP documentation or help resources for specific guidelines on using sampled data and nested expressions, as there may be additional constraints or best practices to follow.
  
  
  Related Information:
  
  SAP Documentation: Look for specific documentation related to the version of SAP you are using, as error handling and expression syntax can vary between versions.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Debugging Tools: Utilize SAP's debugging tools to trace the execution of your query or calculation to identify where the error is occurring.
  
  By following these steps, you should be able to resolve the CM_EHENV_CDEF042 error and successfully use your sampled data in nested expressions.