MySQL Random Query Generator

I am running a RQG test and keep getting this message after running for a couple of minutes or so:

2015-09-17T11:11:17 [25859] runall.pl will exit with exit status STATUS_ENVIRONMENT_FAILURE (110)

I have tried to search online but cannot find anything regards the meaning of this message.

This is the test i am running leading to this messages. But other tests keep producing the same message FYI.

perl runall.pl --basedir=/var/lib/mysql --gendata=conf/examples/example.zz --grammar=conf/examples/example.yy --threads=1 --queries=100000 --duration=3600

I am running the test on percona 5.6 server.