How To Fix BRAIN581 - Input-ready formula '&1 &2' cannot be inverted

SAP Error Message - Details

• Message type: E = Error

• Message class: BRAIN -

• Message number: 581

• Message text: Input-ready formula '&1 &2' cannot be inverted

What causes this issue?

In this query, input-ready formula '&V1& &V2&' is used. The system uses
inverse formulas on basis key figures to back-calculate entries in
formulas like this. The inverse formulas required for this are defined
in Query Designer. The inverse formula that the system selects depends
on the status of the operands in the inverse formulas. The following
operand statuses are possible:

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

An operand has been entered
An operand has been fixed
An operand has already been calculated by another formula
An operand is not input-ready.
The system now searches for an inverse formula that as many operands as
possible have been defined for. If this selection is not unique, the
inverse formula with the highest priority wins. During this process, a
formula group can only be calculated once. If no inverse formulas are
found, the system displays this message.

System Response

The entries cannot be processed.

How to fix this error?

Check the entries or fixed cells.
Enter fewer values
Revoke any fixing of cell values
The following messages list which operands go into input-ready key
figure '&V1& &V2&' and which status these operands have (entered,
calculated, fixed, not input-ready).

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 BRAIN581 - Input-ready formula '&1 &2' cannot be inverted ?

  The SAP error message BRAIN581 indicates that there is an issue with an input-ready formula in SAP BW (Business Warehouse) or SAP BPC (Business Planning and Consolidation). Specifically, the error states that the formula cannot be inverted, which typically means that the formula is not structured in a way that allows for the calculation to be reversed or solved for a specific variable.
  Cause:
  
  Formula Structure: The formula may be incorrectly structured or may contain elements that do not allow for inversion. For example, if the formula involves division by a variable that can be zero, it cannot be inverted.
  Circular References: The formula might create a circular reference, where the output depends on itself, making it impossible to calculate.
  Data Type Issues: There may be data type mismatches or incompatible operations within the formula.
  Missing Variables: The formula may reference variables that are not available or not defined in the context of the calculation.
  
  Solution:
  
  Review the Formula: Check the structure of the formula for any logical errors. Ensure that it is set up correctly and does not contain any circular references.
  Check for Division by Zero: Ensure that the formula does not involve division by a variable that could potentially be zero.
  Simplify the Formula: If possible, break down the formula into simpler components or calculations that can be inverted.
  Validate Variables: Ensure that all variables used in the formula are defined and available in the context of the calculation.
  Test with Sample Data: Run the formula with sample data to see if it produces the expected results without errors.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on input-ready formulas and their requirements.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  Training and Documentation: Review training materials or documentation related to SAP BW/BPC formulas to better understand how to construct input-ready formulas correctly.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with an SAP expert or your organization's SAP support team for further assistance.