Appendix C
Troubleshooting and Common Questions
©
National Instruments Corporation
C-7
ENET-232 and ENET-485 Series User Manual
•
Check that the serial device server is connected to the network and the
LINK
LED is lit.
•
Verify that the hostname is correctly entered in the DNS table. For
more information, refer to the
Cannot Access Device When Using
topic, earlier in this appendix.
•
If the serial device server is located on a different subnet, refer to the
Cannot Communicate with Devices Located on Other Subnets
topic,
earlier in this appendix.
Serial Device Server refused request
This error message occurs if the serial device server is unable to process a
diagnostics command. The most likely cause of this problem is that a serial
port is open by another user or application. Close all serial ports and run
the diagnostics program again. All serial ports are closed if all port LEDs
are off.
Could not directly access the serial port
This error message occurs in response to an error with the serial device
server. Reboot the serial device server and run the diagnostics program
again. If this problem persists, contact National Instruments.
Could not locally access the serial port
This error message occurs in response to an error with the
Windows 2000/NT driver. Reinstall the software as described in Chapter 2,
, and try the diagnostics program again. If this problem persists,
contact National Instruments.
Linux
x
86/Solaris 2.
x
VI_ERROR_RSRC_NFOUND
This error message occurs if a problem is encountered while attempting to
communicate with the serial device server.
•
Confirm the serial device server is turned on.
•
Make sure the serial device server is properly configured. Refer to the
Installing the Serial Device Server
section in Chapter 2,
,
for detailed instructions.
•
You may be using the incorrect Ethernet cable to connect to the serial
device server. If the serial device server is connected directly to a
network interface card (NIC), use an Ethernet crossover cable. Use an
