I get an error message
security: Rejecting argument with illegal chars: %h/cloud_suite_%u_%g.log ...
If your applet doesn't start and you see the following error message in the details
security: Rejecting argument with illegal chars: ...
, check, if you used a '%'-character inside your JNLP. Starting Java 7 Update 53 some characters, like the
%-character, are not allowed inside a JNLP anymore.
If you cannot work around the %-character, try to move the argument where the character is used into your HTML file instead of the JNLP.
All snippets starting SignLive! CC cloud suite 6.2.0 moved some args like logging from the JNLP to the HTML file. Take a look, if you need an example.