-539 I/O error; performing retry

[Beno]

I’m hoping that you did a forum search for -539.
There are only a few results and they are all worth a read.
This one has some tips that @philip just eluded to…

IO error between EPIC and SNAP PAC R1

We use a groov epic to manage two snap pac R1 ( 1 for digital IO and 1 for analog IO). In the strategy, we have a chart to recopy all IO from our snap pac R1 with the function “move I/O unit to numeric table ex” and we call it every 100ms. Everything works well, but sometimes, an IO error ( id -539 ) occured during the function. The error appears on the digital unit or analog. We upgraded snap pac R1(10.0f) and groov(1.4.3-b130) with the last release without results.