Could not instantiate implementation

[shang2014]

When I run the code :"./run.sh import /conf/janusgraph-cassandra-es.properties /tmp /tmp/schema.json /tmp/datamapper.json", there is some error---Exception in thread "main" java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cassandra.thrift.CassandraThriftStoreManager.
But, in gremlin console I can instantiate implementation successfully. Why?

[yhwang]

Can you provide detailed information for the exception, including the stack trace?