When you open an Access file, if Access doesn't find a referenced file in the specified location, it searches for the reference as follows.
1	When	when	SCONJ	_	Case=Nom	3	mark	_	_
2	you	you	PRON	PERS-P2	_	3	nsubj	_	_
3	open	open	VERB	PRES	Mood=Ind|Tense=Pres|VerbForm=Fin	22	advcl	_	_
4	an	an	DET	IND-SG	Definite=Ind|PronType=Art	6	det	_	_
5	Access	Access	PROPN	SG-NOM	Case=Nom	6	compound	_	_
6	file	file	NOUN	SG-NOM	Number=Sing	3	obj	_	SpaceAfter=No
7	,	,	PUNCT	Comma	_	12	punct	_	_
8	if	if	SCONJ	_	_	12	mark	_	_
9	Access	Access	PROPN	SG-NOM	Case=Nom	12	nsubj	_	_
10	does	do	AUX	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	aux	_	SpaceAfter=No
11	n't	not	PART	NEG	_	12	advmod	_	_
12	find	find	VERB	INF	VerbForm=Inf	3	advcl	_	_
13	a	a	DET	IND-SG	Definite=Ind|PronType=Art	15	det	_	_
14	referenced	reference	ADJ	PASS	Case=Nom	15	amod	_	_
15	file	file	NOUN	SG-NOM	Number=Sing	12	obj	_	_
16	in	in	ADP	_	_	19	case	_	_
17	the	the	DET	DEF	Definite=Def|PronType=Art	19	det	_	_
18	specified	specify	ADJ	PASS	Case=Nom	19	amod	_	_
19	location	location	NOUN	SG-NOM	Number=Sing	12	obl	_	SpaceAfter=No
20	,	,	PUNCT	Comma	_	3	punct	_	_
21	it	it	PRON	PERS-SG	_	22	nsubj	_	_
22	searches	search	VERB	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
23	for	for	ADP	_	_	25	case	_	_
24	the	the	DET	DEF	Definite=Def|PronType=Art	25	det	_	_
25	reference	reference	NOUN	SG-NOM	Number=Sing	22	obl	_	_
26	as	as	SCONJ	_	_	27	mark	_	_
27	follows	follow	VERB	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	22	advcl	_	SpaceAfter=No
28	.	.	PUNCT	Period	_	22	punct	_	_
