Measurement Computing GPIB-488 User Manual
Page 112
Appendix C
IBERR
C-6
GPIB-488
ESRQ—SRQ in "ON" position
Cause:
A wait for an RQS can not occur because the GPIB SRQ line is ON.
Solution:
Verify the following:
•
Ignore the ESRQ until all devices are found.
•
Make sure
ibdev
is called to open all devices on the bus
capable of asserting SRQ.
•
Test that each device is unasserting SRQ.
•
Check the cabling. Make sure that all devices are attached
and the connectors are seated properly.
ETAB—Table problem
Cause:
There was a problem with a table used in a
FindLstn
or
FindRQS
.
Solution:
•
If the error occurs during a
FindLstn
, this is a warning
and not an error. Ignore the warning or make the buffer
larger.
•
If the error occurs during a
FindRQS
, then none of the
specified devices are requesting services. Verify that the
device list contains the addresses of all online devices.
EHDL—Invalid handle
Cause:
EHDL results when an invalid handle is passed to a function call.
Solution:
•
Do not use a device descriptor in a board function or
vice-versa.
•
Make sure that the board index passed to the call is valid.