Error Code : 1324 Undefined CURSOR - mysql

Question

I just started learning MySQL and am having trouble compiling a procedure.
It's giving me an error undefined cursor. I looked up a few examples on this forum and corrected my code but it still throws the same error.
DELIMITER $
CREATE PROCEDURE MY_PROC()
BLOCK1: BEGIN
DECLARE LOOP1_DONE BOOLEAN DEFAULT FALSE;
DECLARE VAR_TKR VARCHAR(100) DEFAULT 0;
DECLARE TKR_VALUE VARCHAR(100) DEFAULT 0;
-- OTHER VARIABLE DECLARATIONS
DECLARE CUR1 CURSOR FOR SELECT DISTINCT TKR FROM STG_TBL;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET LOOP1_DONE = TRUE;
-- SET VARIABLE VALUES
OPEN CUR1;
CUR1_LOOP: LOOP
FETCH CUR1 INTO VAR_TKR;
IF LOOP1_DONE THEN
CLOSE CUR1;
LEAVE CUR1_LOOP;
END IF;
-- OTHER SELECT STATEMENTS AND CALCULATIONS
BLOCK2: BEGIN
DECLARE LOOP2_DONE BOOLEAN DEFAULT FALSE;
DECLARE CUR1_DATA CURSOR FOR
SELECT TKR_VALUE
FROM STG_VALUE_TBL
WHERE TKR = VAR_TKR
ORDER BY TKR_DATE;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET LOOP2_DONE = TRUE;
OPEN CUR1_DATA;
-- SET VARIABLE VALUES
CUR1_DATA_LOOP: LOOP
FETCH CUR1_DATA INTO TKR_VALUE;
IF LOOP2_DONE THEN
CLOSE CUR1_DATA;
LEAVE CUR1_DATA_LOOP;
END IF;
-- OTHER SELECT STATEMENTS AND CALCULATIONS
END LOOP CUR1_DATA_LOOP;
END BLOCK2;
-- CLOSE CUR1_DATA; <removed as not needed>
END LOOP CUR1_LOOP;
-- CLOSE CUR1; <removed as not needed>
END BLOCK1;
$
DELIMITER;
Please find below table and sample data:
CREATE TABLE STG_TBL
(
ID NUMERIC(38),
TKR VARCHAR(10) NOT NULL
);
INSERT INTO STG_TBL VALUES (100000,'TKR1');
INSERT INTO STG_TBL VALUES (200000,'TKR2');
INSERT INTO STG_TBL VALUES (300000,'TKR3');
COMMIT;
CREATE TABLE STG_VALUE_TBL
(
TKR_DATE DATE,
TKR VARCHAR(10),
TKR_VALUE DECIMAL(20,10),
ADDED_DATE DATE
);
INSERT INTO STG_VALUE_TBL VALUES ('01-01-2015','TKR1','10.231','01-30-2016');
INSERT INTO STG_VALUE_TBL VALUES ('01-02-2015','TKR1','18.151','01-30-2016');
INSERT INTO STG_VALUE_TBL VALUES ('01-03-2015','TKR1','22.952','01-30-2016');
COMMIT;