The current version is iVS V100R001C02SPC123. It gives Errorcode 999115450 when playback the recordings.
Check the capture packets between MPU server and IVS client. Client side keeps sending SETUP message, and MPU side keeps sending ACK messages, which means IVS client didn't get the ACK message from MPU side. It's probably caused by network.
The network between MPU server and IVS client is abnormal.
Check the network first.