Just got this trace: <br><br><span dir="ltr" id=":vm">&gt;&gt;&gt; Validating cluster settings...<br>&gt;&gt;&gt; Cluster settings are valid<br>&gt;&gt;&gt; Starting cluster...<br>&gt;&gt;&gt; Launching a 1-node cluster...<br>
&gt;&gt;&gt; Launching master node...<br>&gt;&gt;&gt; Master AMI: ami-415eb028<br>&gt;&gt;&gt; Creating security group @sc-clusty...<br>Traceback (most recent call last):<br>  File &quot;build/bdist.macosx-10.6-universal/egg/starcluster/cli.py&quot;, line 965, in main<br>
    sc.execute(args)<br>  File &quot;build/bdist.macosx-10.6-universal/egg/starcluster/cli.py&quot;, line 181, in execute<br>    scluster.start(create=not self.opts.no_create)<br>  File &quot;build/bdist.macosx-10.6-universal/egg/starcluster/utils.py&quot;, line 26, in wrapper<br>
    res = func(*arg, **kargs)<br>  File &quot;build/bdist.macosx-10.6-universal/egg/starcluster/cluster.py&quot;, line 533, in start<br>    self.create_cluster()<br>  File &quot;build/bdist.macosx-10.6-universal/egg/starcluster/cluster.py&quot;, line 457, in create_cluster<br>
    placement=self.availability_zone)<br>  File &quot;build/bdist.macosx-10.6-universal/egg/starcluster/cluster.py&quot;, line 437, in run_instances<br>    security_groups=[master_sg, cluster_sg],<br>NameError: global name &#39;master_sg&#39; is not defined<br>
<br>cli.py:973 - ERROR - Oops! Looks like you&#39;ve found a bug in StarCluster<br>cli.py:974 - ERROR - Please submit this bug to <a href="mailto:starcluster@mit.edu">starcluster@mit.edu</a><br></span><div id=":us" class="kd">
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