SAP Message VBDRV035 - Disallowed symbol in TRUE/FALSE field for numerical attribute

Diagnosis
You determined a Boolean selection rule for attribute &V1&.Non-numerical attributes are stored in the fields TRUEand FALSE although the format of the attribute isnumerical.
As a result, you cannot compare the sender attributes with the contentsof the fields TRUE and FALSE or assign TRUE or FALSE after thederivation has been carried out.

System Response
The derivation is assigned the status 'Completed with error'.
If the derivation is static, it is stored, but the system does not makechanges to the master data or the characteristics of the receivingbatch.

Procedure
Correct the receiver condition record.
For static derivations: Repeat the derivation or correct the derivedvalues in the receiving batch manually.