I have a small DLL that I use to output two analog voltages using the function DAQmxWriteAnalogF64(). I call the DLL repeatedly with varying output voltgage levels. After a set time of 4m 55 seconds (not always the same but quite close) the output voltages passed are no longer being output. I look at the error code from the Write function and it is -200088 "Task Specified is Invalid or does not exist" Any ideas as to why my task becomes invalidated after a certain time interval?? It happes whether or not I start the task first then repeatedly call the Write function with the auto start of task set to NO or if I have the auto start of task set to YES.
