User`s guide

126 Chapter 4
Troubleshooting Information
Checking PC Client Connections
Runtime Error Messages
Common runtime errors that may occur in your programs when using an
E5810 are described in the following table, where “viopen
” is a VISA open
command.
Message Description/Actions
viopen fails:
Invalid address
errors
Use the E5810 Welcome page on your Web browser to verify that the
GPIB address, GPIB interface name, and/or GPIB logical unit
configuration values are correct. Or, you can use VISA Assistant.
To open VISA Assistant, click the blue IO icon on the Windows taskbar
and then click
Run VISA Assistant.
viopen fails:
No connection
The connection to the E5810 failed for one of these reasons:
 A TCP/IP network timeout occurred because the network
connection is down or the E5810 is down.
 The E5810 has reached its maximum concurrent client
connections (16) and this new connection was refused.
You may need to have a client close its connection or you may
need to reboot the E5810 to close all client connections to allow
a new connection to be made. Up to 16 sessions can be in use
at any one time.
viopen fails:
Timeout
The client has timed out. The E5810 has not responded within the
appropriate timeout time because:
 The network connection is down or the E5810 is down.
 The server is busy performing an operation for a different client.
You may need to increase the
Client Timeout Delta configuration
value on the LAN client. To set this value, click the blue IO icon
on the Windows taskbar and then click
Run IO Config.
From the IO Config main screen, select (highlight)
TCPIP LAN
Client (LAN Instruments)
and then click the Configure button.
When the
LAN Client dialog box appears, set the desired Client
Timeout Delta
value and then click the OK button.