Hi Rona,
The error -10609 can result from several situations in which the device's resources are already in use.
1) A Measurement & Automation (MAX) test panel is already open.
If you open a test panel window for your device and attempt to run your LabVIEW application, you can get this error. If this is the case, close the MAX test panel.
2) An AI Clear VI was not used at the end of the previous acquisition.
If you do not call the AI Clear VI after performing your acquisition, the resources remain open. Be sure to call this VI, inputting your taskID, at the end of the acquisition. This error frequently occurs if a LabVIEW VI was stopped by clicking the Abort Execution button because this prevents the execution of any other VIs or functions
that have yet to run in the program.
3) Multiple programs are accessing the device.
If you have multiple VIs accessing the device, or perhaps a LabVIEW VI and another application, the resource will be taken and you will receive the error. You can only run one application accessing the specific resource (for example, analog input on channel 0) at a time.
I hope this helps,
Andrew A
Applications Engineer
National Instruments
