XNode Error for Discrete Transfer Function in LabVIEW 2025 Q3

Issue Details

A LabVIEW program developed in LabVIEW 2015 SP1 was opened in LabVIEW 2025 Q3, resulting in a block diagram error:

"Library defining XNode not found"

This error is linked to the "Discrete Transfer Function" block, which worked correctly in the original version. Is there any solution to use this function in LabVIEW newer version?

Solution

Unfortunately, there is currently no direct alternative available for LabVIEW 2025 Q3 as LabVIEW 2025 Q3 no longer supports the XNode-based “Discrete Transfer Function” block. To use this functionality, you must manually recreate the discrete transfer function using standard LabVIEW blocks such as shift registers, feedback nodes, and mathematical operations.

If you are using LabVIEW 2022 Q3 or earlier, you can still access the Discrete Transfer Function.vi from the Control Design and Simulation Module Toolkit, which provides similar functionality without relying on XNodes.

Additional Information

The Control Design and Simulation Module is only compatible with versions up to LabVIEW 2022 Q3, and cannot be used with the latest LabVIEW versions.