LabVIEW Real-Time Module 8.2.1 Readme

December 2006

This file contains important information about the LabVIEW Real-Time Module 8.2.1, including installation, upgrade, and compatibility issues.


You must install LabVIEW 8.2.1 before you install the LabVIEW Real-Time Module 8.2.1. Refer to the LabVIEW Real-Time Module Release and Upgrade Notes for more information about upgrade and compatibility issues, a list of new features, and installation instructions. The LabVIEW Real-Time Module Release and Upgrade Notes is included as a printed booklet with the kit. You also can access this document by selecting Help»Search the LabVIEW Help in LabVIEW and navigating to the Real-Time Module»Real-Time Module Related Documentation topic on the Contents tab.

New Supported Target

At the time of this release, the LabVIEW Real-Time Module 8.2.1 supports the following new RT target, in addition to the targets supported by version 8.20.

Supported Platforms

The Real-Time Module supports Windows 2000/XP and Windows Vista (32-bit and 64-bit). The Real-Time Module does not support Windows NT/Me/9x.

Refer to the LabVIEW Real-Time Module Release and Upgrade Notes for a complete list of system requirements.

Bug Fixes

LabVIEW Real-Time Module 8.2.1 includes the following bug fixes.

Bug ID Issue
41AEB7NM Fixed an issue where shared variables with the RT FIFO enabled always returned a 0 timestamp.
41EBS33Q Fixed an issue where programmatically creating FIFOs using the Format Into String VI resulted in duplicate FIFOs.
41C5TUQR Fixed an issue where the RT Wait Timer configured for microsecond resolution caused a memory leak when used on a Windows PC.
41B9Q3BK Fixed an issue where lateness detection for Timed Loops failed when two or more Timed Loops were used in VxWorks.
44I832KI Fixed an issue where the RT target would crash if the Halt system if TCP/IP fails setting was disabled and the target was unable to initialize the network device.
41A96VBK Fixed issues related to using RT FIFOs to transfer data between Timed Loops with different priorities.
42CHH33W Fixed an issue where using the Stop Timed Structure VI to repeatedly stop a Timed Loop nested inside of a While Loop caused instability.
43KEAEM3 Fixed an issue where cRIO 900x Controllers did not function properly on a DHCP server with infinite lease time.
44DDLOKI Fixed an issue where running an executable with an RT FIFO on a Windows PC caused instability.
42JAIUPI Fixed an issue where the RT Get Timestamp VI returned late values.
N/A Fixed various other minor issues related to RT FIFO functions.

Known Issues

All Target Platforms



© 2006 National Instruments Corporation. All rights reserved.

Under the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or mechanical, including photocopying, recording, storing in an information retrieval system, or translating, in whole or in part, without the prior written consent of National Instruments Corporation.

National Instruments, NI,, LabVIEW, and the LabVIEW Real-Time Module are trademarks of National Instruments Corporation. Refer to the Terms of Use section on for more information about National Instruments trademarks.