Diagnosis
When checking the hierarchy &V2& for the InfoObject &v3&, characterswere found that are not permitted. Besides the standard characters(capital letters, numbers, some symbols), only the additional specialcharacters maintained in customizing are permitted, since the valuesare used as a key in database tables.

System Response
When executing queries, queries can occur if users are working withwith different code pages, since values entered are converted indifferent ways.

Procedure
Therefore, if you wish to use the characters in the keys, maintain themin customizing. Please note for this the difficulty of working withcode pages.