Just passing on I am using the drools 5.4.0Beta2

The following doesn't compile using the mvel dialect .
rule "some rule"
when
fact: Fact()
then
BasicFact fault= new BasicFact( "/*");
end

but
rule "some rule"
when
fact: Fact()
then
BasicFact fault= new BasicFact( "/ *");
end

does compile some how /* is being parsed as an expression I think and not a string literal.

Thanks,
Ben