Hi,
we use the USB-6009 device and seem to encounter the Windows 7 EHCI driver problem.
But how do we get the "USB Transfer Request Count Property" workaround (Doc. ID: 3K6BT0UR) to work with the C-interface?
We tried the DAQmxSetAOUsbXferReqCount function but got the following result:
DAQmx Error: Specified property is not supported by the device or is not applicable to the task.
Property DAQmx_AO_UsbXferReqCount
Status Code: -200452
According to the workaround description it requires DAQmx 9.4 at least.
Should be no problem with using 9.5.