dio_enable_cache_missing_db_values

	status.i4.v = dio_enable_cache_missing_db_values()

	This routine allows the programmer to enable caching of missing
	database values.  This is the default state.

	This function returns status values as follows:

	TRUE			caching of missing database values was
				previously enabled
	FALSE			caching of missing database values was
				previously disabled

	This function requires the following include files:

	cnsparam_h, diolib_h

	Related functions:

	dio_disable_cache_missing_db_values, dio_is_caching_missing_db_values

	C/C++ usage:

	int	status;

	status = dio_enable_cache_missing_db_values();