I use the last version of driver. (version 7.4.4f7)
It is clear for me the advantage of the DAQmx over Traditional and probably this will be the solution of our problem.
As it was mention by my colleague the application is more complex (use 3 NI boards: 6602, 6534, 6035) and whole application was build up considering Traditional driver. So the effort to port the whole application on DAQmx have be taken into account.
The strange thing about this error is that only on some computers the error appears. I monitor the CPU load and memory and the application does not have memory leak.There are computers on which the application runs well for billions of steps but on some computers the application crashed. One of the difference between them is that the WindowsXP and language is on German(on the crashed computers). I reinstall the last version of Traditional but no results.
I will try to clean up the operating system and install everything on English and repeat the test.
So in this condition maybe you understand me why I don't want to spend other effort to port the whole application on DAQmx. The application satisfy our needs with Traditional driver, except this error (-10810).
I noticed an other issue. The error dissapears in 2 ways:
1. Restart the application
2. Let the application open, Go To -> Measurement & Automation(icon desktop) ->Device and interfaces-> NI6602. After I performed some tests on this board the error dissapear and every thing works well for some steps (e.g. 50.000) until the error will occur again.(without to stop the application).
One more time many thanks for your help and promptitude.