You cannot use probes and other traditional LabVIEW debugging techniques in FPGA VIs when you run them on FPGA targets. You instead can use indicators on the FPGA VI block diagram. Place indicators anywhere on the block diagram where you need to see data to verify the functionality of the VI. You can use this procedure when the signals you want to observe change slowly relative to the speed with which the host computer communicates with the target.

Complete the following steps to use an indicator as you would a probe in an existing FPGA VI.

1. Create a new VI or open an existing VI under an FPGA target that also contains FPGA I/O items.
2. Right-click the wire you want to monitor and select Create»Indicator from the shortcut menu.
3. Repeat step 2 for each wire you want to monitor.
4. Compile the VI.

You now can run the FPGA VI using interactive front panel communication or programmatic FPGA interface communication to view and verify the data in the FPGA VI.