Closing A Session - Agilent Technologies ESA-E Series Programmer's Manual

The following are examples of valid symbolic names:
VXI0::24::INSTR Device at VXI logical address 24 that is of VISA type
INSTR.
VXI2::128 Device at VXI logical address 128, in the third VXI
system (VXI2).
GPIB-VXI0::24 A VXI device at logical address 24. This VXI device is
connected via an HP-IB/VXI command module.
GPIB0::7::0 An HP-IB device at primary address 7 and secondary
address 0 on the HP-IB interface.
The following is an example of opening a device session with the HP-IB
device at primary address 23.
ViSession defaultRM, vi;
.
.
viOpenDefaultRM(&defaultRM);
viOpen(defaultRM, "GPIB0::23::INSTR", VI_NULL,VI_NULL,&vi);
.
.
viClose(vi);
viClose(defaultRM);

Closing a Session

The viClose function must be used to close each session. You can close
the specific device session, which will free all data structures that had
been allocated for the session. If you close the default resource manager
session, all sessions opened using that resource manager will be closed.
Since system resources are also used when searching for resources
(viFindRsrc) or waiting for events (viWaitOnEvent), the viClose
function needs to be called to free up find lists and event contexts.
Chapter 3
Programming Examples
C Programming Examples using VTL
3-11