SAP Message BRAIN565 - Input-ready %GT formula &1 has an illegal operand

Diagnosis
Input-ready formula &V1& calculates the percentage that a structureelement makes up of the total sum (%GT) of the structure element. Twocondition need to be met here:
The operand of the %GT formula must be an input-ready structure element,while the key figure component must be a basic key figure.
Disaggregation must be set for the operand of the input-ready %GTformula.
At least one of these conditions has not been met here.

System Response
The query has errors and will not be generated.

Procedure
The query definition must be adjusted accordingly.