I use JBoss Rules in my project and I have a problem with this rule

[then]addList "{value}" {expression}
=liste.add(new Integer({value})); {expression}

The drl line wich matches with this rule is like that:

addList "125" addList "130" addList "135" addList "140"

The number of element to add could change but when I have more than 9 elements, I have a compilation problem:

rg.drools.rule.InvalidRulePackage: unknown:124:0 Unable to expand: niveaux concernes : addList "20" addList "29" addList "35" addList "40" addList "45" addList "50" addList "65" addList "70" addList "75" addList "80". Due to To many iterations in processing the expression: [addList "20" addList "29" addList "35" addList "40" addList "45" addList "50" addList "65" addList "70" addList "75" addList "80"] with target template: [liste.add(new Integer({value})); {expression}]

Is there a limit of iterations??
Is it a bug?