which situction call MIP SDK will lead to Inactive status task

hi, we are developing plugin by call MIP SDK, now we face difficulty. when we developing backup video feature, sometimes the task will be Inactive status which lead to the following task can not be run. Can you guide the possibile reason so that we can try to avoid it. we tried your RemoteRetrieval demo,also Inactive status. we are sure the parameter we send is all right. RetrievalTask retrievalTask;

retrievalTask = _manager.Retrieve(channel.m_FQID.ObjectId, videoStartTime.ToUniversalTime(), videoEndTime.ToUniversalTime());

This is a known issue, please see this KB article –

https://supportcommunity.milestonesys.com/s/article/XProtect-2020-R3-cumulative-patch-installers?language=en_US

I see this is a solution for 2020 R3, so futuer 2021 R1 will also solve this issue, right?

Yes.