use dclock and get negative run time

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use dclock and get negative run time

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Hi, everyone!

I'm using "dclock" (with "use ifport") for the timing of my application. It works well for a short run, i.e. 300 seconds. But for a long run, i.e. 1 or 2 days, it gives a negative time. Could anyone give an explanation?

Thanks!

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