Need suggestion on error treating strategy

I tried to construt a projec by LabVIEW. It consists of ActiveX controls, Signal Acquiring control, Signal Analysis, etc. And I architecture it with state machine. Synchoronization technique was introduced into the project to sychronize the UI Response and corresponding Background Operations, or to protect the Critical Section shared by some operations. In the end it run.
But something I haven't realized. That's the exception treating mechanism. How should I organize the error treating in a 'big' project? Something like the exception-catch-throw mechanism, or anything else?
Till now, what I hnew about the error treating in LabVIEW is like 'combining error'.
Any ideas and demos are appreciated!
And Thanx ahead.
Edward

HI, Dynamik,
Thanx for your great ideas. But I'm not sure about something.
1, "Write an event-logger to capture-to-disk program-events "
Does it mean I should register error event to treat errors? To synchronize the error treating, with 'notifier' or 'queue' ?
Before LabVIEW, my tool is Visual C++. And some mechanics/methodology impact on my thoughts. Maybe I was being trapped! So, I'm not sure that whether the error treatment be dealed serially or parallel?
2, "Check for errors frequently (always), beware that native functions and sub-VIs can handle existing errors in undesireable ways. Some functions will execute even if there's already an error wired in, and may REPLACE the original error with a new error if the function fails. This can be very misleading when debugging. Other functions will NOT execute if there's an error wired in - even if you want them to. It's common to Not wire the error-cluster to Task&Refnum Close functions (using some other data dependency to determine proper execution order.)"
How to 'Check for Errors' ? Wire all error out serially or combine them? Sorry for my not sure about it.
If any demo is available , that'll be wonderful! The examples of LabVIEW doesn't involved anything on it.
Thank you, Dynamik, again. Great idea you gave me!

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