National Instruments AT User Manual Page 179

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Appendix D Troubleshooting and Common Questions
Serial Hardware and Software for Windows D-20 ni.com
Troubleshooting Diagnostic Messages
This section lists possible error messages returned by the diagnostic utility,
along with solutions.
No National Instruments Serial Port Found
If the
No National Instruments serial port found
error message
appears, complete the following steps:
1. Verify the hardware resources, as follows:
a. Select Start»Settings»Control Panel and double-click on the
niports icon.
b. In the Ports list, select a port and click on the Settings button.
If the serial port is missing from the Ports list, reinstall the
hardware and software. For instructions on how to do so, refer to
the installation and verification chapter for your hardware
platform.
c. In the General Port Settings dialog box, click on the Resources
button to view the resources for the port.
d. Check the hardware resources. If they are in conflict, refer to the
previous section, Resolving Resource Conflicts.
2. Make sure that the National Instruments serial driver is installed,
as follows:
a. Locate the
serial.sys
file in the
WinNT\system32\drivers
directory.
b. If the
serial.sys
file is missing, reinstall the hardware and
software. For instructions on how to do so, refer to the installation
and verification chapter for your hardware platform.
c. Right-click on the
serial.sys
file and select Properties.
d. ClickontheVersion tab. If the Company Name is Microsoft,
the National Instruments serial driver is not installed properly.
To solve this problem, reinstall the NI-Serial software. For
instructions on how to do so, refer to the installation and
verification chapter for your hardware platform.
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