---
name: "viOpenDefaultRM"
section: "3visa"
platform: "linux"
package: "libvisa-dev"
version: "0.0.20130812-6+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/viOpenDefaultRM"
---

# viOpenDefaultRM(3visa)

Create and return a handle to the default VISA resource manager

## NAME

viOpenDefaultRM - Create and return a handle to the default VISA resource manager

## SYNOPSIS

**#include \<visa.h\>**

**ViStatus viOpenDefaultRM(ViSession \****resource\_manager***);**

## DESCRIPTION

This function creates a new handle referencing the default VISA resource manager, and stores it at the address given by the *resource\_manager* parameter. This handle can then be used to find and open instruments or instrument buses. This is typically the first function invoked by client applications.

When the handle is no longer needed, it should be closed using the **viClose()** function.

## RETURN VALUE

On success, **VI\_SUCCESS** is returned, and the new handle is stored at the given address.

On failure, an error code is returned, and the new handle initialized to **VI\_NULL.**

## SEE ALSO

**[viClose(3visa)](/viClose/3visa.md)**, **viFindRsrc(3visa)**, **viOpen(3visa)**, **[visa(7visa)](/visa/7visa.md)**