Wolfgang suggests using 5.3 or 5.4 as both bring many, many new features and improvements over 4.0.7.<br><br>You are also more likely to get help with a newer version (as most 
people will say &quot;have you tried with 5.3+) if you post problems relating
 to 4.0.x.<br>
<br>The problem you state is caused by not having org.eclipse.jdt.core_3.6.2.v_A76_R36x.jar (or something named similarly, depending on the version of Eclipse you are using, on your classpath). AFAIK this is included with later (i.e. &gt;5.2 onwards) versions of Drools.<br>
<br>If you Google for Drools you will easily encounter the Drools Home page and links to download.<br>

<br>
With kind regards,<br><br>Mike<br><br><div class="gmail_quote">On 14 May 2012 11:03, paco <span dir="ltr">&lt;<a href="mailto:fifi_njikam@yahoo.fr" target="_blank">fifi_njikam@yahoo.fr</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello Laune! Because I&#39;m following all istrution presented in the &quot;JBoss<br>
Drools Businness Rules&quot;  book.<br>
Is it due bye a version of the Drools?<br>
Can you tell me can I find Drools 5.3.0 or 5.4.0?<br>
<br>
Thanks<br>
<br>
<br>
<br>
--<br>
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<div class="HOEnZb"><div class="h5">Sent from the Drools: User forum mailing list archive at Nabble.com.<br>
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