Hello Philipp,
Unfortunately, your field name too long for the object selection in InfoSet Query.
The data retrieval is dynamically generated at runtime, depending on the field you have selected for the selection.
This can be done, however only a restricted line length is available.
The long field name is a part of the generated lines and it is truncated to errors.
To avoid the error to your field names must be reduced to 23 characters.
Regards,
Keith