viOpenDefaultRM
Purpose
This function returns a session to the Default Resource Manager resource.
C Syntax
ViStatus viOpenDefaultRM(ViPSession sesn)
Visual Basic Syntax
viOpenDefaultRM&(sesn&)
Resource Classes
VISA Resource Manager
Parameters
| Name | Direction | Description |
|---|---|---|
|
sesn |
OUT |
Unique logical identifier to a Default Resource Manager session. |
Return Values
| Completion Codes | Description |
|---|---|
|
VI_SUCCESS |
Session to the Default Resource Manager resource created successfully. |
|
VI_WARN_CONFIG_NLOADED |
At least one configured Passport module could not be loaded. |
| Error Codes | Description |
|---|---|
|
VI_ERROR_SYSTEM_ERROR |
The VISA system failed to initialize. |
|
VI_ERROR_ALLOC |
Insufficient system resources to create a session to the Default Resource Manager resource. |
|
VI_ERROR_INV_SETUP |
Some implementation-specific configuration file is corrupt or does not exist. |
|
VI_ERROR_LIBRARY_NFOUND |
A code library required by VISA could not be located or loaded. |
Description
The viOpenDefaultRM() function must be called before any VISA operations can be invoked. The first call to this function initializes the VISA system, including the Default Resource Manager resource, and also returns a session to that resource. Subsequent calls to this function return unique sessions to the same Default Resource Manager resource.
When a Resource Manager session is passed to viClose(), not only is that session closed, but also all find lists and device sessions (which that Resource Manager session was used to create) are closed.
Related Topics