Sorry...
I think I have to correct my post...
I installed the new DAQmx version yesterday and everything was fine.
A few moments ago I changed my code at a location (I added texts on a windows form) which has nothing to do with the task-routine. After building a new version an Installing it on the PC, the Problem occured again. It also happens only in the Startup. If I start my program manually or with a delay of some seconds (the good old vbs-script :-)) - it works.
I'm using a normal PC, WinXP and the NI USB 6525.
The program is written in c#. When my Mainform is loaded, a backgroundworker is initialized to read the digital inputs frequently.
these are some lines of the used code (the error occurs between Log(creating task) and Log (starting...) )
// start read NI (in load_Form)
this.backgroundWorkerNIInput.RunWorkerAsync();
...
// Backgroundworker for NI Input
private void backgroundWorkerNIInput_DoWork(object sender, DoWorkEventArgs e)
{
// enable Bgw events
this.backgroundWorkerNIInput.WorkerReportsProgress = true;
try
{
Log("creating Task ... NI");
using (digitalReadTask = new Task())
{
Log(
"starting ... NI");
digitalReadTask.DIChannels.CreateChannel(m_NIReadDevice,
"",ChannelLineGrouping.OneChannelForAllLines);
bool[] dataArray = new bool[4];
DigitalSingleChannelReader reader = new DigitalSingleChannelReader(digitalReadTask.Stream);
....
