if index global is empty executor throws error

[adaptun]

s rset = ##class(%ResultSet).%New("SpatialIndex.QueryExecutor:FindWindow")
w rset.Execute("^noglobal",3,3,15,15),!
while (rset.Next()){
w rset.Get("Id"),!
}

zGet+1^SpatialIndex.IndexNode.1 ^noglobal