Client Tools :: Error / ORA-00900 / Invalid SQL Statement After Executing Procedure

CREATE OR REPLACE PROCEDURE test
IS
CURSOR cusers IS SELECT user_name, user_date FROM users;
uname users.user_name%TYPE;
udate users.user_date%TYPE;
BEGIN
OPEN cusers;

[code].....

When I try to execute this procedure I get following error:

ORA-00900: invalid SQL statement

Compilation of procedure is successful.

SQL code for creating the USERS table is here:

CREATE TABLE "USERS"
("USER_ID" NUMBER(10,0) NOT NULL ENABLE,
"USER_NAME" VARCHAR2(50) NOT NULL ENABLE,
"USER_EMAIL" VARCHAR2(50) NOT NULL ENABLE,
"USER_PASS" VARCHAR2(50) NOT NULL ENABLE,
"USER_DATE" DATE NOT NULL ENABLE,
CONSTRAINT "USERS_PK" PRIMARY KEY ("USER_ID") ENABLE
)