Runtime error "Msg 248" overflowed an int column

[rjsql]

CREATE PROCEDURE GENDSTDATEEX
(@p_Time_Zone VARCHAR(100),
@p_TZ_Start_Date INT,
@p_TZ_End_Date INT,
@p_TZ_Start_Time INT,
@p_TZ_End_Time INT,
@po_Error_Code INT OUTPUT,
@po_Error_Msg VARCHAR(500) OUTPUT
)
AS

BEGIN
DECLARE

@DecimalVar INT,
@v_Rowcount INT,
@v_Time_Zone VARCHAR(100),
@v_TZ_Start_Date INT,
@v_TZ_End_Date INT,
@v_TZ_Start_Time INT,
@v_TZ_End_Time INT,
@e_Error_Code INT,
@e_Error_Msg VARCHAR(100),
@v_year INT,
@v_cnt INT,
@c_Total_Date_Sec INT,
@v_Start_Year INT,
@v_End_Year INT,

@v_UTC_Offset INT,
@v_Daylight_Savings_Offset INT,
@v_Local_DST_Start_Date INT,
@v_Local_DST_Start_Time INT,
@v_Local_DST_End_Date INT,
@v_Local_DST_End_Time INT,
@v_DST_Start BIGINT,
@v_DST_End BIGINT

SET @v_cnt = 1
SET @DecimalVar = -1200.02
SET @c_Total_Date_Sec = 86400
SET @v_TZ_Start_Date = 0
SET @v_TZ_End_Date = 0
SET @v_year = 0

BEGIN
SELECT
@v_UTC_Offset = GMT_OFFSET, @v_Daylight_Savings_Offset = DAYLIGHT_SAVINGS_OFFSET , @v_DST_Start = DST_START,
@v_DST_End = DST_END
FROM
Time_Zone
WHERE
DESCRIPTION = @p_Time_Zone


IF @po_Error_Code > 0 GOTO EXCEPTION


SET @v_Start_Year = CONVERT(INT,SUBSTRING(CONVERT(CHAR,@p_TZ_Start_Date),1,4))
SET @v_End_Year = CONVERT(INT,SUBSTRING(CONVERT(CHAR,@p_TZ_End_Date),1,4))

SET @v_year = @v_Start_Year

/* Create global temporary table to hold the start and end dates for each year of the reporting interval */

CREATE TABLE #DST_DATE_TBLE (START_DATE INT, END_DATE INT, START_TIME INT, END_TIME INT, IS_DST INT)

/* Store into table converted set of specific start and end dates after taking into account Daylight Savings Time */

WHILE ( @v_year <= @v_End_Year )
BEGIN

EXEC Convert_DST @v_year, @v_DST_Start, @v_Local_DST_Start_Date, @v_Local_DST_Start_Time, @po_Error_Code OUTPUT, @po_Error_Msg OUTPUT
IF @po_Error_Code > 0
BEGIN
SET @E_ERROR_CODE = @po_Error_Code
SET @E_ERROR_MSG = @po_Error_Msg
GOTO EXCEPTION
END

EXEC Convert_DST @v_year, @v_DST_End, @v_Local_DST_End_Date, @v_Local_DST_End_Time, @po_Error_Code OUTPUT, @po_Error_Msg OUTPUT
IF @po_Error_Code > 0
BEGIN
SET @E_ERROR_CODE = @po_Error_Code
SET @E_ERROR_MSG = @po_Error_Msg
GOTO EXCEPTION
END

IF( @v_TZ_Start_Date <= @v_Local_DST_Start_Date and @v_Local_DST_Start_Date <= @v_TZ_End_Date) AND
( @v_TZ_Start_Date <= @v_Local_DST_End_Date and @v_Local_DST_End_Date <= @v_TZ_End_Date)
BEGIN
INSERT INTO #DST_DATE_TBLE VALUES (@v_Local_DST_Start_Date, @v_Local_DST_End_Date, 0, 0, 0)
END

SET @v_year = @v_year + 1

END

END

EXCEPTION:
BEGIN
SET @po_Error_Code = 7
SET @po_Error_Msg = 'Time Zone Input Error!! - Undefine Time Zone.'
END


END
GO

The runtime error I get is
&quot;Server: Msg 248, Level 16, State 1, Procedure GENDSTDATEEX, Line 47
The conversion of the varchar value '5110020000' overflowed an int column. Maximum integer value exceeded.&quot;
Line 47 is the SELECT clause in red above.

My exec input is the following :
Declare @error_code_output INT
Declare @error_msg_output varchar(4000)
EXEC GENDSTDATEEX '(GMT-08:00) Pacific Time (US & Canada); Tijuana', '20021122',
'20021127',000000,235959,@po_error_code = @error_code_output OUTPUT,
@po_error_msg = @error_msg_output OUTPUT[/]
What is causing this error? Thanks in advance!