在max里reset一下device, 参看:
Error code: - 50103
Description: The specified resource is reserved. The operation was completed by ignoring or overriding the specified resource.
Possible cause: The device is in use by another program/VI, or a previous DAQ task did not release the device resources.
Solutions: Make sure you have freed the device for use by another program or task instance. For example, you might not have wired a stop condition to a DAQ Assistant Express VI configured for single point acquisition.