SEC Charges Ex-Peregrine Execs with Fraud  WASHINGTON (Reuters) - The U.S. Securities and Exchange  Commission on Wednesday said it filed civil fraud charges  against six former senior officers at Peregrine Systems Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=PRGN.PK target=/stocks/quickinfo/fullquote"&gt;PRGN.PK&lt;/A&gt; who orchestrated and tried to cover up a massive  accounting fraud at the technology company.