© National Instruments Corporation D-1 NI-488.2 User Manual for Windows
DWindows 98/95:
Troubleshooting and
Common Questions
This appendix describes how to troubleshoot problems and answers some
common questions about the NI-488.2 software for Windows98/95.
Troubleshooting EDVR Error Conditions
In some cases, NI-488.2 calls may return with the ERR bit set in ibsta and
the value EDVR in iberr. The value stored in ibcntl is useful in
troubleshooting the error condition.
EDVR Error Condition with ibcntl Set to 0xE028002C (–534249428)
If a call is made with an interface number that is within the range of allowed
interface numbers (typically 0 to 3), but which has not been assigned to a
GPIB interface, an EDVR error condition occurs with ibcntl set to
0xE028002C. You can assign an interface number to a GPIB interface by
configuring the NI-488.2 software and selecting an interface name. For
information about how to configure the NI-488.2 software, refer to the
online help in the NI-488.2 Configuration utility, as follows:
1. Select Start»Programs»National Instruments NI-488.2»Explore
GPIB to start Measurement & Automation Explorer.
2. Expand the Devices and Interfaces directory by clicking on the + next
to the folder.
3. Right-click on your GPIB interface and select Properties from the
drop-down menu that appears.
EDVR Error Condition with ibcntl Set to 0xE0140025 (–535560155)
If a call is made with an interface number that is not within the range of
allowed interface numbers (typically 0 to 3), an EDVR error condition
occurs with ibcntl set to 0xE0140025.