AppendixD Troubleshootingand Common Questions
SerialHardware and Software for Win dows D-20 ni.com
TroubleshootingDiagnostic Messages
Thissection lists possible error messages returned by the diagnostic utility,
along with solutions.
No National Instruments Serial Port Found
Ifthe No National Instruments serial port found errormessage
appears,complete the following steps:
1. Verifythe hardware resources, as follows:
a. Select Start»Settings»Control Panel and double-click on the
niports icon.
b. In the Por ts list, select a port and click on the Settings button.
If the serial port is missing from the Ports list, reinstall the
hardwareand software. For instructions on how to do so, refer to
the installation and verificationch apter for your hardware
platform.
c. In the General Port Settings dialog box, click on the Resources
buttonto view the resources for the port.
d. Checkthe hardware resources. If they are in conflict, refer to the
previoussection, Resolving Resource Conflicts.
2. Makesure that the N ational Instruments serial driveris installed,
asfollows:
a. Locate the serial.sys filein the WinNT\system32\drivers
directory.
b. If the serial.sys file is missing, reinstall the har dware and
software.For instructions on how to do so, refer to the installation
and verificationchapter for your hardware platform.
c. Right-click on the serial.sys file and select Properties.
d. ClickontheVersiontab.If the Company Name is Microsoft,
the National Instruments serial driveris not installed properl y.
Tosolve this problem, reinstall the NI-Serial software. For
instructionson how to do so, refer to the installation and
verificationchapter for your hardware platform.