Hi,
If you translate the error message, you'll find it as "wird mehr als eine struktur in der query verwendet"
"there is more than one structure used in the query"
Please check your query whether you are using number of structure or not.
Plz refer and read the following document:
http://help.sap.de/saphelp_nw73ehp1/helpdata/en/4b/c347cd494650e9e10000000a15822b/frameset.htm
Regards,
Antony Jerald.