National Instruments NI-488.2 - Manual (Page 112)

Appendix C Error Codes and Solutions
© National Instruments Corporation C-11 NI-488.2 User Manual
• A boardID outside the range of 0–99 is passed in to a traditional
NI-488 board-level function or NI-488.2 routine.
• ibconfig or ibask is called with a device unit descriptor and
a board-only configuration option, or with a board unit descriptor
and a device-only configuration option.
Solutions
Do not use a device descriptor in a board function or vice-versa.
Make sure that the board index passed to the NI-488.2 call is valid.
EWIP (26)
EWIP indicates that an ibwait call is already in progress on the specified
unit descriptor. This error occurs when one thread within a process calls
ibwait on a given descriptor when another thread within the same process
is already performing an ibwait using that same descriptor.
Solutions
Make sure that for any given unit descriptor only one thread calls ibwait
at a time using that descriptor.
ERST (27)
ERST results when an event notification was cancelled due to a reset of the
interface.
An ibwait call pending in the driver returns ERST in the following
situations:
• Another thread in the same process calls ibonl using the same unit
descriptor as ibwait.
• Another thread or another process issues a board-level ibonl 1 .
An ibnotify Callback may be invoked with ERST in the following
situations:
• Another process issues a board-level ibonl 1 .