Hi,
This is a difficult one. Does this happen after doing something specific? Or after the application has reached a certain state? Or is it pretty random? Are you using OPC to talk to FieldPoint from DSC? Or front-panel DataSocket-OPC? How is the CPU usage when this happens?
I guess your system kept running because DSCEngine was still running.
How reproducible is this? Is it possible to narrow down your application (for troubleshooting purposes) to a smaller and simpler one with as little VIs and with memory tags? And post it here?
Sorry for not being of much help here.
Regards,
Khalid