Added some error handling in cases of real time data requests with missing required info.
Added some error handling in cases of real time data requests with
missing required info.

KBurov/qdms,qusma/qdms,leo90skk/qdms,underwater/qdms,Jumaga2015/qdms,qusma/qdms,underwater/qdms,leo90skk/qdms