dio_delete_pdb_all

	status.i4.v = dio_delete_pdb_all(device_index.i4.r)

	This routine removes all PDBs (and DI/PI entries) from the DIO scaling 
   	database.  This clears them from the program's cache of the central
   	database scaling information.

	device_index	device index to delete cached information for
			(If a value of NULL is passed, cached information
			 for all devices will be deleted.)

	This function returns status values as follows:

	number of PDB entries deleted

	This function requires the following include files:

	cnsparam_h, diolib_h

	Related functions:

	dio_delete_pdb, dio_delete_pdb_lst, dio_delete_cache

	C/C++ usage:

	int	status;
	int	device_index = 14430;

	status = dio_delete_pdb_all(&device_index);