LabVIEW NXG 5.1 FPGA Module Known Issues


This document contains the LabVIEW NXG FPGA Module known issues that were discovered before and since the release of LabVIEW NXG 5.1 FPGA Module. Known issues are performance issues or technical bugs that NI has acknowledged exist within this version of the product.


Not every issue known to NI appears on this list; it is intended to show the most severe and common issues that you may encounter and provide workarounds when possible. Other technical issues that you may encounter could occur through normal product use or system compatibility issues. You may find more information on these issues in NI’s Product Documentation, Knowledgebase, or Community.

Bug Number

Legacy ID



113402 709263

Renaming an FPGA Application Breaks Associated Open FPGA VI Reference Nodes Referencing That Application

Renaming an FPGA Application breaks associated Open FPGA VI Reference nodes referencing that application because the 'Rename and Update' dialog fails to automatically update the reference to use the new name.


Manually point the Open FPGA VI Reference to the correct FPGA Application.

Reported Version:

LabVIEW NXG FPGA Module 3.0

Resolved Version:



Oct 28, 2018

207867 744863

Errors outside of Clock-Driven Logic can incorrectly refer to the source of the error as an Optimized FPGA VI.

Some errors outside of Clock-Driven Logic can incorrectly refer to "Optimized FPGA VI" as the source of the error. One example is an uninitialized shift register on a For Loop.


Double-click the error in the Errors and Warnings tab to be taken to the actual error source.

Reported Version:

LabVIEW NXG FPGA Module 4.0

Resolved Version:



Apr 3, 2020


LabVIEW FPGA I/O Nodes cannot be used in LabVIEW Classes.

Using I/O Nodes in LabVIEW FPGA Classes will result in an error at edit time stating that I/O Nodes cannot be used in class member VIs. 


There is currently no known workaround for this issue.

Reported Version:

LabVIEW NXG FPGA Module 5.0

Resolved Version:



May 15, 2020

Final Time Issue Listed

Issues found in this section will not be listed in future known issues documents for this product.

There are currently no issues to list.

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Glossary of Terms


  • Bug ID - When an issue is reported to NI, you may be given this ID or find it on  You may also find IDs posted by NI on the discussion forums or in KnowledgeBase articles.
  • Legacy ID – An older issue ID that refers to the same issue.  You may instead find this issue ID in older known issues documents.
  • Description - A few sentences which describe the problem. The brief description given does not necessarily describe the problem in full detail.
  • Workaround - Possible ways to work around the problem.
  • Reported Version - The earliest version in which the issue was reported.
  • Resolved Version - Version in which the issue was resolved or was no longer applicable. "N/A" indicates that the issue has not been resolved.
  • Date Added - The date the issue was added to the document (not the reported date).