Diagnosis
You are using operand &V2& in the schema step duringbilling &V4& to differentiate a usage factor. However, this operandhas the same unit of measurement &V3& as in an operand &V1& used in aprevious schema step.
The usage factor is always determined with reference to a unit ofmeasurement. The operand is only used for a flexible definition of theactual usage in the schema.
To differentiate between various usage factors it is necessary to usedifferent units of measurements.
The usage that is to be used when calculating a usage factor must notbe differentiated using the input operand of variant QUANTI24.

Procedure
Check your billing schema with regard to the use of variant QUANTI24and its input operands.
Also refer to the documentation of this variant program.