Provided by: libgpib-doc_4.3.7-5_all 
NAME
iberr - holds error code
SYNOPSIS
#include <gpib/ib.h>
volatile int iberr;
DESCRIPTION
iberr is set whenever a function from the 'traditional' or 'multidevice' API fails with an error. The
meaning of each possible value of iberr is summarized in the following table:
Table 3. iberr error codes
┌─────────────────────┬────────────────────────────┬────────────────────────────────────────┐
│ constant │ value │ meaning │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ EDVR │ 0 │ A system call has failed. │
│ │ │ ibcnt/ibcntl will be set to │
│ │ │ the value of errno. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ECIC │ 1 │ Your interface board needs │
│ │ │ to be controller-in-charge, │
│ │ │ but is not. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ENOL │ 2 │ You have attempted to write │
│ │ │ data or command bytes, but │
│ │ │ there are no listeners │
│ │ │ currently addressed. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ EADR │ 3 │ The interface board has │
│ │ │ failed to address itself │
│ │ │ properly before │
│ │ │ starting an io operation. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ EARG │ 4 │ One or more arguments to the │
│ │ │ function call were invalid. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ESAC │ 5 │ The interface board needs to │
│ │ │ be system controller, but is │
│ │ │ not. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ EABO │ 6 │ A read or write of data │
│ │ │ bytes has been aborted, │
│ │ │ possibly due to a │
│ │ │ timeout or reception of a │
│ │ │ device clear command. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ENEB │ 7 │ The GPIB interface board │
│ │ │ does not exist, its driver │
│ │ │ is not loaded, or it is │
│ │ │ not configured properly. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ EDMA │ 8 │ Not used (DMA error), │
│ │ │ included for compatibility │
│ │ │ purposes. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ EOIP │ 10 │ Function call can not │
│ │ │ proceed due to an │
│ │ │ asynchronous IO operation │
│ │ │ (ibrda(), ibwrta(), or │
│ │ │ ibcmda()) in progress. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ECAP │ 11 │ Incapable of executing │
│ │ │ function call, due the GPIB │
│ │ │ board lacking the │
│ │ │ capability, or the │
│ │ │ capability being disabled in │
│ │ │ software. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ EFSO │ 12 │ File system error. │
│ │ │ ibcnt/ibcntl will be set to │
│ │ │ the value of errno. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ EBUS │ 14 │ An attempt to write command │
│ │ │ bytes to the bus has timed │
│ │ │ out. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ESTB │ 15 │ One or more serial poll │
│ │ │ status bytes have been lost. │
│ │ │ This can occur due to │
│ │ │ too many status bytes │
│ │ │ accumulating (through │
│ │ │ automatic serial polling) │
│ │ │ without being read. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ESRQ │ 16 │ The serial poll request │
│ │ │ service line is stuck on. │
│ │ │ This can occur if a │
│ │ │ physical device on the bus │
│ │ │ requests service, but its │
│ │ │ GPIB address has not │
│ │ │ been opened (via │
│ │ │ ibdev() for example) by any │
│ │ │ process. Thus the automatic │
│ │ │ serial polling routines │
│ │ │ are unaware of the device's │
│ │ │ existence and will never │
│ │ │ serial poll it. │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ECNF │ 17 │ There is a syntax or value │
│ │ │ error in the configuration │
│ │ │ file. This error can │
│ │ │ be returned by ibfind() and │
│ │ │ ibdev(). │
├─────────────────────┼────────────────────────────┼────────────────────────────────────────┤
│ ETAB │ 20 │ This error can be returned │
│ │ │ by ibevent(), │
│ │ │ FindLstn(), or │
│ │ │ FindRQS(). See their │
│ │ │ descriptions for more │
│ │ │ information. │
└─────────────────────┴────────────────────────────┴────────────────────────────────────────┘
If you wish to avoid using a global variable, you may instead use ThreadIberr() which returns a
thread-specific value.
COPYRIGHT
Copyright © 2003-2006, 2008 Frank Mori Hess
linux-gpib 4.3.7 11/28/2025 IBERR(3)