This was a regression due to substantial changes of the DRL compiler. MVEL strict mode has nothing to do with this.

I'm not sure when the fix was deployed, but you should have this MVEL2 jar in your classpath - check the size. And you may need a Drools built from the latest of the 5.2.0.M2 branch.

... 711693 2011-05-02 14:12 ./org/mvel/mvel2/2.1-SNAPSHOT/mvel2-2.1-20110501.033205-24.jar
... 711693 2011-05-02 14:12 ./org/mvel/mvel2/2.1-SNAPSHOT/mvel2-2.1-SNAPSHOT.jar

Tested successfully with
   import function java.lang.Math.*;
   rule x
   when
       $i: Imaginary( eval(atan2(im,re) > PI/4.0) )
   then end

-W


On 3 May 2011 00:07, jkrupka <jkrupka@gmail.com> wrote:
I remember reading some stuff about changes in 5.2 regarding a new strict
mode -
http://docs.jboss.org/drools/release/5.2.0.M2/drools-introduction-docs/html_single/index.html#d0e354

So it might be a compile warning/issue... which you could fix, or I think
just turn off strict mode?

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