Passing invalid command type does not produce friendly error message

[hari90]

$ ./tpccbenchmark --create=load --nodes=hari-1.cluster-cbtcvpszcgdq.us-west-2.rds.amazonaws.com -c config/workload_all_rds.xml --dir tpcc_data
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
03:14:28,050 (DBWorkload.java:853) INFO - Num New Order transactions : 0, time seconds: 1800
03:14:28,055 (DBWorkload.java:854) INFO - Num WH : 10
03:14:28,055 (DBWorkload.java:855) INFO - TPM-C: 0
03:14:28,058 (DBWorkload.java:856) INFO - Efficiency : 0%
03:14:28,058 (DBWorkload.java:858) INFO - 
03:14:28,058 (DBWorkload.java:858) INFO - 
03:14:28,058 (DBWorkload.java:858) INFO - 
03:14:28,058 (DBWorkload.java:858) INFO - 
03:14:28,058 (DBWorkload.java:858) INFO -

--create=load is not a valid command and should have failed the process with a user friendly error message