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Error Codes and Solutions
EDVR (0)
EDVR is returned when the device or board name passed in an ibfind call
is not configured in the software. In this case, the variable ibcntl
contains the OS/2 error code 2, Device not found, or error code 110, Open
failed.
EDVR is also returned when an invalid unit descriptor is passed to any
function call. In this case, the variable ibcntl contains the OS/2 error
code 6, Invalid handle.
EDVR is also returned when the driver (gpib.sys) is not installed.
Solutions
1.
Use only device or board names that are configured in the software
utility ibconf as parameters in the ibfind function.
2.
Use the unit descriptor returned from the ibfind function as the first
parameter in subsequent NI-488 functions. Examine the variable after
the ibfind and before the failing function to make sure it was not
corrupted.
3.
Make sure the NI-488.2M driver is installed by checking the
gpibinst.inf file in the root directory.
4.
Check the config.sys file in the root directory and make sure it
contains the following line:
DEVICE= dir \gpib.sys
where dir is the directory that contains the file gpib.sys.
NI-488.2M SRM for OS/2
B-2
© National Instruments Corp.
Appendix B
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