Error -1073807300 When Opening More Than 64 COM Ports on LinuxRT System

Updated Feb 25, 2025

Reported In

Hardware

  • PXIe-8432

Operating System

  • LabVIEW Real-Time (NI Linux Real-Time)

Issue Details

I have many PXIe-843x cards and a total of 96 COM ports. I am encountering Error -1073807300 when opening more than 64 COM ports. It works fine with fewer than 64 ports. I am using a PXIe-8861 Controller with LabVIEW Linux RT installed. What should I do?

Solution

Please check the visaconf.ini file on your system and see what the value is for MaxNumResources. The default value for this property is 64 for LinuxRT systems. Please update the MaxNumResources value in visaconf.ini to a number higher than 64, such as 96 or 100, and see if it resolves the issue. The path for the visaconf.ini file is /etc/ni-visa/visaconf.ini.

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