Reference Guide > O Routines > OPTION_IS_LOADED Function
  

OPTION_IS_LOADED Function
Checks if a specified Option Programming Interface (OPI) optional module is currently loaded.
Usage
result = OPTION_IS_LOADED (option_name)
Input Parameters
option_name—(string) The name of the OPI option to check.
Output Parameters
result—A value indicating the status of the given OPI option.
*1—Indicates the OPI option is currently loaded.
*0—Indicates the OPI option is not loaded.
Keywords
None.
Discussion
OPI options can be loaded explicitly by any PV‑WAVE user using the LOAD_OPTION procedure. These optional modules can be written in C or FORTRAN, and can contain new system functions or other primitives. For detailed information on creating OPI options, see the PV‑WAVE Application Developer’s Guide.
Example
IF NOT OPTION_IS_LOADED('xml') THEN $
   LOAD_OPTION, 'xml'
See Also
LOAD_OPTION, SHOW_OPTIONS, UNLOAD_OPTION

Version 2017.0
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