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Why are My Time Stamps on Shared Variables, LabVIEW DSC Alarms and Events and/or Data Logged to the Citadel Database Incorrect and Unpredictable?

Primary Software: LabVIEW Development Systems>>Professional Development System
Primary Software Version: 8.5
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem:
My time stamps on shared variables, LabVIEW DSC alarms and events and/or data logged to the Citadel database are incorrect. They increase or decrease unpredictably in time. What is happening?

Solution:
If you are seeing unpredictable, incorrect time stamps on your shared variables, LabVIEW DSC alarms and events and/or data logged to the Citadel database, this is unexpected behavior and is most likely due to the AMD Multi-Core/Multiprocessor issue discussed in KB 4BFBEIQA: AMD Multi-Core/CPU Systems Can Cause Unexpected Behavior in NI Driver Software linked below. This linked KB discusses all the reasons and fixes for this issue.

Note: This issue has also been known to cause crashes of the shared variable engine when logging shared variables to the Citadel database with LabVIEW DSC.

Related Links: KnowledgeBase 4BFBEIQA: AMD Multi-Core/CPU Systems Can Cause Unexpected Behavior in NI Driver Software

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Report Date: 01/17/2008
Last Updated: 01/24/2008
Document ID: 4HGE270W

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