Exceptions only occur during execution. The runtime exceptions are:

	Too many GOSUBs
	User CAUSED exception
	Improper entry to error handler detected
	Dynamic variable used but not assigned
	Upper bound is less than lower bound
	File already exists (use REPLACE)
	Datatype mismatch
	Statistics are not enabled
-1001	Program interrupted
-1002	Source code changed
-3101	Dynamic variable datatype mismatch
-3102	Nonexistent structure field referenced
-4001	Illegal digit in decoded string
-4002	Numeric base in DECODE/ENCODE$ not between 2 and 16
-4003	Illegal argument to ORDNAME$()
-4004	Illegal argument to date$
-4005	Illegal argument to DAYS
-4006	Invalid logical value
-4007	Invalid input screen format
-4008	Illegal memory address to MEM function
-4009	Illegal argument to ENCODE$()
-4010	Illegal argument to CHARSET$()
-4016	Illegal length argument
-4017	Expression or statement invalid
-4021	Illegal validation rule
-7011	Must close structure before reusing structure name
-7012	Error in directory name
-7013	Invalid attempt to update a key field
-7014	Deadlock detected
-7015	Database engine rejected add or update
-5001	Program interrupted
-5002	Exceeded virtual memory
-7001	Miscellaneous file error
-7002	Error in structure file
-7003	Error in data dictionary
-7004	Error in data file
-7005	No privilege for operation
-7006	No such record
-7007	Not a key field
-7008	Unknown DBMS in structure
-7009	Duplicate key
-7010	File full
-8001	Structure reference of nonexistent field
-8002	Numeric conversion error
-8003	Unsupported field data type
-8004	Disk quota exceeded
-8102	Syntax error in DATA
-10001	Illegal passing mechanism
-10002	Can't call external routine
-10003	Error in external routine
-10004	Dispatch routine not found
-10005	Illegal symbol name
-10006	Setting symbol failed
-10007	Ambiguous symbol definition
1001	Illegal number
1002	Integer overflow
1002	Floating overflow
1003	Overflow in built-in function
1004	Overflow in evaluating VAL
1006	Overflow on READ number
1007	Overflow in numeric input from terminal
1051	Overflow in evaluating string expression
1053	Overflow on READ string
1054	String too long on input
2001	Subscript out of bounds
3001	Division by zero
3002	Negative number raised to a nonintegral power
3003	Zero raised to negative power
3004	LOG() of zero or negative number
3005	SQRT() of negative number
3006	MOD or REM had zero divisor
3007	Argument to ACOS or ASIN not in range -1<=X<=1
3008	Attempt to evaluate ANGLE(0,0)
4001	Illegal argument to VAL()
4002	Illegal argument to CHR$()
4003	Illegal argument to ORD()
4004	Illegal argument to SIZE
4005	Index in TAB less than one
4006	SET MARGIN value less than zonewidth
4007	SET ZONEWIDTH value greater than margin
4008	LBOUND index out of range
4009	UBOUND index out of range
4010	Second argument to REPEAT$ < 0
5001	REDIM overflow
6005	REDIM first index greater than second
7001	Bad channel number
7002	Attempt to open or close channel zero
7003	Channel number already in use
7004	File not open
7100	Invalid file attribute
7101	Too many files open
7110	File not found
7112	File locked by another user
7120	Illegal file name
7305	No current record
7322	Delete or update not allowed
8001	Out of DATA
8002	Too few input items
8003	Too many input items
8011	End of file on input
8012	Too few data items in record
8013	Too many data items in record
8101	READ a non-number
8102	Syntax error in input
8103	Non-numeric input when number expected
8105	Invalid file input
8201	Bad format$() or using string
8301	Record is larger than record size
8401	Timeout on input
8402	Illegal numeric value for time-expression
10001	ON index out of range
10002	RETURN without GOSUB
10004	SELECT found no matching CASE
10005	Chained program unavailable

Table D-1 ASCII Character Set

	Decimal Value	ASCII character equivalent
	0	NUL
	1	SOH
	2	STX
	3	ETX (CTRL/C)
	4	EOT
	5	ENQ
	6	ACK
	7	BEL (bell)
	8	BS (backspace)
	9	HT (horizontal tab)
	10	LF (linefeed)
	11	VT (vertical tab)
	12	FF (form feed)
	13	CR (carriage return)
	14	SO
	15	SI (CTRL/O)
	16	DLE
	17	DCL (CTRL/Q XON)
	18	DC2
	19	DC3 (CTRL/S XOFF)
	20	DC4
	21	NAK (CTRL/U)
	22	SYN
	23	ETB
	24	CAN
	25	EM
	26	SUB (CTRL/Z)
	27	ESC (escape)
	28	FS
	29	QS
	30	RS
	31	US
	32	SP (space)
	33	!
	34	"
	35	#
	36	$
	37	%
	38	&
	39	' (apostrophe)
	40	(
	41	)
	42	*
	43	+
	44	, (comma)
	45	-
	46	.
	47	/
	48	0
	49	1
	50	2
	51	3
	52	4
	53	5
	54	6
	55	7
	56	8
	57	9
	58	:
	59	;
	60	<
	61	=
	62	>
	63	?
	64	@
	65	A
	66	B
	67	C
	68	D
	69	E
	70	F
	71	G
	72	H
	73	I
	74	J
	75	K
	76	L
	77	M
	78	N
	79	O
	80	P
	81	Q
	82	R
	83	S
	84	T
	85	U
	86	V
	87	W
	88	X
	89	Y
	90	Z
	91	[
	92	\ (backslash)
	93	]
	94	^ (or up arrow)
	95	_ (or back arrow)
	96	` (grave accent)
	97	a
	98	b
	99	c
	100	d
	101	e
	102	f
	103	g
	104	h
	105	i
	106	j
	107	k
	108	l
	109	m
	110	n
	111	o
	112	p
	113	q
	114	r
	115	s
	116	t
	117	u
	118	v
	119	w
	120	x
	121	y
	122	z
	123	{
	124	| (vertical line)
	125	}
	126	~ (tilde)
	127	del (rubout)