在pig脚本中声明错误

Question

%declare SOURCEPATH '/user/training/us_records/us-500.csv'  
%declare STOREPATH '/user/training/us_records/us_result.csv'  
table_data = LOAD '/user/training/us_records/us-500.csv' USING     PigStorage(',')  
AS(firstname :CHARARRAY,
lastname :CHARARRAY,
company :CHARARRAY,
address :CHARARRAY,
city :CHARARRAY,
country :CHARARRAY,
state :CHARARRAY,
zip :INT,
phone1: INT,
phone2 :INT,
email :CHARARRAY,
web :CHARARRAY);  
people_sample = GROUP table_data BY (country,state);  
pss = SAMPLE people_sample 0.01;  
STORE pss INTO '$STOREPATH';

结果：     消息：org.apache.pig.backend.executionengine.ExecException：错误2118：输入路径不存在：file：/user/training/us_records/us-500.csv