Landing declaration

My Landing declaration is rejected for the reason; You have submitted a LAN without a preceding RTP. A Return To Port was not received within 2 hours. The LAN has now been rejected. Submit RTP and resubmit LAN;

A landing declaration can only be sent or accepted when you have sent a return to port massage. This reason means that your RTP message is not received/ accepted by the government. Please wait until you received the accepted message for your RTP message or resent your RTP message before sending your landing declaration.