[StarCluster] starcluster createimage

[Neil Gong]

Dear Sir/Madam,

My name is Neil Gong, a graduate student of EECS at UC Berkeley. I'm
using your tool StarCluster. I encountered a problem. When I first
used starcluster createimage, it created an image for me successfully,
but when I tried this the second time, I encountered a error:

cli.py:1079 - ERROR - No certificate file (pem) file specified


Every other function is OK. I can start a cluster .

Thanks
Neil