Generally, each system can resend multicast messages upon your resend request message. As it could be used for the recovery, it doesn't need contact us if you would like only to recover the message.
If you would like to investigate the dropping messages, please fill in a form "電文抜け申告シート v2" in System Documents Site and send it by e-mail for investigation.
(If you require immediate assistance, please call us)
<Contact information>
JPX Service Desk Network Trouble
TEL：050-3819-1030
*Please visit "System Documents Site" and follow the instructions as below:
System Documents > arrownet > Application/Usage Fee Related >【arrownet】電文抜け申告シート