Unable to start cluster (3 replies)

I am trying to set-up MySQL Cluster 7.4.7 on 2 Ubuntu 14.04 machines with below configuration:
Machine 1
-------
Management node 1
Sql node 2
Data node 2
API node 2


Machine 2
-------
Sql node 1
Data node 1
API node 1

On clicking Deploy and start cluster in the wizard, I get this error:
Command ‘[u’/path/to/cluster/bin/ndb_mgmd’, ‘--initial’, ‘—ndb-nodeid=49’, ‘--config-dir=/path/MySQL_Cluster/49/’, ‘—config-file=/path/MySQL_Cluster/49/config.ini’]’ retuned non-zero exit status 1

Please suggest what am I missing or how to troubleshoot it.