Diagnosis
To calculate the carrier of a formula group in a structure, inverseformulas have to be defined for all input-ready operands. Theinput-readiness of these operands is normally defined in the samestructure, the structure of the carrier. The carriers and their inverseformulas form a separate formula group for each selection element in theother structure.
In this case, input-readiness for cell &V1& was probably activatedinadvertently, for example in the other structure. This means that thereis no inverse formula for carrier &V2& for element &V1&. This wouldviolate the consistency of multiplied formula group &V2&.

System Response
The input#readiness of cell &V1& is cancelled, as inverse formula &V2&would otherwise not have any correct inversions.

Procedure
If you do not want input-readiness to be cancelled for cell &V1&, youneed to modify the input-ready formula so that the situation describedabove no longer occurs.