The device doesn't answers. Did you check the comm. channels via TCP / SCP?
Sometimes the load of the system is on its limit - CPU completely busy - so no time for this "background operation" is available (10 sec is the timeout).
What data are changed? Be "careful" with new or existing types e.g. as IN/OUT/IN_OUT for functions/function blocks or even inside.
Use also the latest soft/firmware.
A complete "build" also helps from time to time...
Is it only with this particular project or also with another or even "empty" one?
