[drools-dev] The type _3_r1_0 collides with a package

[fanory]

Hello,

I have this error code when i try to start drools engine with this drl:
<?xml version="1.0"?>
<rule-set name="iris.73 ruleset"
        xmlns="http://drools.org/rules";
        xmlns:java="http://drools.org/semantics/java";
        xmlns:xs="http://www.w3.org/2001/XMLSchema-instance";
        xs:schemaLocation="http://drools.org/rules rules.xsd
        http://drools.org/semantics/java java.xsd">
        <java:import>java.lang.Object</java:import>
        <java:import>java.lang.String</java:import>
        <java:import>iris.drools.domain.*</java:import>
        <java:import>iris.drools.util.*</java:import>
        <rule name="73.r1">
        <parameter identifier="beneficiary" >
                    <class>iris.drools.domain.Beneficiary</class>
            </parameter>
            <java:condition>
                        true
        </java:condition>
        <java:consequence>
                
        </java:consequence>
        </rule> 
</rule-set>
I get this message at the compile:
INFO [main] - loadRules: ../../../drl/iris73v3.drl
DEBUG [main] - compiling drools.org.iris_73_ruleset_1141133065374.java._3_r1_0
A problem occured compiling the embedded code: 
drools/org/iris_73_ruleset_1141133065374/java/_3_r1_0.java(16)
The type _3_r1_0 collides with a package 

ERROR [main] - org.drools.semantics.java.JavaSemanticCompileError

Thanks in advance !