Environment information
Vert.x version: 2.1.2
Java version: 1.7.0_67
Server version: Ubuntu 14.04.1
vert-x/mod-mysql-postgresql version: io.vertxmod-mysql-postgresql0.3.0-SNAPSHOT
What caused the errror:
vertx runzip
Error I got:

langs.properties

Confusion
Two servers with same setting and same zip package.
One server has no trouble to do vertx runzip, but another server display this message to me.
References:
#24