Error Virtuoso / Soprano

I have errors messages in the file .kde4/share/apps/nepomuk/repository/main/data/virtuosobackend/soprano-virtuoso.log

The error is:

compiler text card estimate got error 22023 FT370: Wildcard word needs at least 4 leading characters, assuming unknown count

Does anyone know what it is this error and how can I correct the pb?

Sincerely,
Fred