Automatic Subscription Trigger Issue

[Pandidivya_Ganesh]

Hi,

I am trying to create a subscription in SAP DM (In Manage Automatic triggers), which will trigger a production process whenever the tag value changes and I had given 15 sec as a retention time. It is working fine, but sometimes even though the tag value changes, I don't see my PPD is getting triggered, so I checked the logs of the agent instance responsible for triggering this subscription, then I saw the below errors.

Can any one help me understand these logs and what could be the reason behind them.

Thanks,
Divya