Hello. I wonder if you can help me. I'm using the National 6501 card and DAQmxbase driver ver. 2.1 (the most recent version I could find) and the function in Delphi language on Windows XP. My application basically needs to read inputs with a timer component at 300 msec rate and write outputs when the operator press buttons. But when I try to write, the system crashes. I tried to use semaphores, mutex and other software implementations, but still, when I try to write, seven times out of 10, the system crashes and does not respond and it is necessary to kill the process. I don't know exactly what's happening but it is as if the call to the DAQmxWriteDigitalU8 does not return or the function DAQmxBaseIsTaskDone does not finish. Has anyone ever had problems with reading and writing at the same time when the application needs using at a high rate?
I would very much appreciate your help.
Thanks
