Hi, I was following the instructions in Tutorial 3 and use the same pig script in the tutorial. The script: a = LOAD 'geolocation' using org.apache.hive.hcatalog.pig.HCatLoader(); b = filter a by event != 'normal'; c = foreach b generate driverid, event, (int) '1' as occurance; d = group c by driverid; e = foreach d generate group as driverid, SUM(c.occurance) as t_occ; g = LOAD 'drivermileage' using org.apache.hive.hcatalog.pig.HCatLoader(); h = join e by driverid, g by driverid; final_data = foreach h generate $0 as driverid, $1 as events, $3 as totmiles, (float) $3/$1 as riskfactor; store final_data into 'riskfactor' using org.apache.hive.hcatalog.pig.HCatStorer(); However, it gives me some errors like this: WARNING: Use "yarn jar" to launch YARN applications. ... 2016-07-29 09:11:18,610 [main] ERROR org.apache.pig.PigServer - exception during parsing: Error during parsing. Could not resolve org.apache.hive.hcatalog.pig.HCatLoader using imports: [, java.lang., org.apache.pig.builtin., org.apache.pig.impl.builtin.] Failed to parse: Pig script failed to parse: <file script.pig, line 1, column 29> pig script failed to validate: org.apache.pig.backend.executionengine.ExecException: ERROR 1070: Could not resolve org.apache.hive.hcatalog.pig.HCatLoader using imports: [, java.lang., org.apache.pig.builtin., org.apache.pig.impl.builtin.] at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:199) at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1776) at org.apache.pig.PigServer$Graph.access$000(PigServer.java:1484) at org.apache.pig.PigServer.parseAndBuild(PigServer.java:428) at org.apache.pig.PigServer.executeBatch(PigServer.java:453) at org.apache.pig.PigServer.executeBatch(PigServer.java:439) at org.apache.pig.tools.grunt.GruntParser.executeBatch(GruntParser.java:171) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:234) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:205) at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:81) at org.apache.pig.Main.run(Main.java:502) at org.apache.pig.Main.main(Main.java:177) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.util.RunJar.run(RunJar.java:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: <file script.pig, line 1, column 29> pig script failed to validate: org.apache.pig.backend.executionengine.ExecException: ERROR 1070: Could not resolve org.apache.hive.hcatalog.pig.HCatLoader using imports: [, java.lang., org.apache.pig.builtin., org.apache.pig.impl.builtin.] at org.apache.pig.parser.LogicalPlanBuilder.validateFuncSpec(LogicalPlanBuilder.java:1339) at org.apache.pig.parser.LogicalPlanBuilder.buildFuncSpec(LogicalPlanBuilder.java:1324) at org.apache.pig.parser.LogicalPlanGenerator.func_clause(LogicalPlanGenerator.java:5184) at org.apache.pig.parser.LogicalPlanGenerator.load_clause(LogicalPlanGenerator.java:3515) at org.apache.pig.parser.LogicalPlanGenerator.op_clause(LogicalPlanGenerator.java:1625) at org.apache.pig.parser.LogicalPlanGenerator.general_statement(LogicalPlanGenerator.java:1102) at org.apache.pig.parser.LogicalPlanGenerator.statement(LogicalPlanGenerator.java:560) at org.apache.pig.parser.LogicalPlanGenerator.query(LogicalPlanGenerator.java:421) at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:191) ... 17 more Caused by: org.apache.pig.backend.executionengine.ExecException: ERROR 1070: Could not resolve org.apache.hive.hcatalog.pig.HCatLoader using imports: [, java.lang., org.apache.pig.builtin., org.apache.pig.impl.builtin.] at org.apache.pig.impl.PigContext.resolveClassName(PigContext.java:677) at org.apache.pig.parser.LogicalPlanBuilder.validateFuncSpec(LogicalPlanBuilder.java:1336) ... 25 more 2016-07-29 09:11:18,618 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1070: Could not resolve org.apache.hive.hcatalog.pig.HCatLoader using imports: [, java.lang., org.apache.pig.builtin., org.apache.pig.impl.builtin.] Details at logfile: /hadoop/yarn/local/usercache/maria_dev/appcache/application_1469778965378_0006/container_e06_1469778965378_0006_01_000002/pig_1469783473914.log 2016-07-29 09:11:18,648 [main] INFO org.apache.pig.Main - Pig script completed in 4 seconds and 883 milliseconds (4883 ms) ... View more