PCIe 6509 Change detection and error -200284

[cyilh]

I'm using a PCIe 6509 board and Measurement Studio 16.1.45.70 in a C# program in order to get data from 12 digital channels using change detection (one specific channel indicates that data is ready every 50 µs).

Tasks runs for a varying period of time and then times out with error code -200284.

Error appears then very quickly, before the timeout period has elapsed.

I've already read threads dealing with such a similar problem but did not find any solution...

The attached code sample retrieves 3000 samples and a screenshot displays the error.

I've already tried other solutions (asynchronous reads) with no luck...

Help would be appreciated.

Cyril

[cyilh]

2nd try :

My new program "swallows" error -200284 and then starts again reading data.

It runs for a longer period but finally crashes with error -200278.

Any idea ?