I've talked to some people....mainly the people I work with....and they just won't minimize the application. Problem sort of fixed.

I might switch it to a single connection between the decoder and UI and see if that works.

This is a difficult problem to debug considering my app feeds off data from an external device.

The code I gave you had one connection, it really has 6....and will have 8 once completed.
I'm going to try and bring the 6 connection back, then simulate the messaging and see if the problem returns.

I'll post that code when I can...thanks for all your on going help