vdata_id

IN:

Vdata identifier returned by VSattach

	Purpose	Detaches from the current vdata, terminating further access to that vdata.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	VSdetach detaches from the vdata identified by the parameter vdata_id and updates the vdata information in the file if there are any changes. All memory used for that vdata is freed.
		The vdata_id identifier should not be used after that vdata is detached.

	FORTRAN	integer function vsfdtch(vdata_id)
		integer vdata_id