I find myself using the CLI a lot for quick testing, so I'm trying out some fairly complex operations. This one doesn't work: [~] :composite(steps=[{"operation"=>"add-system-property","name"=>"test","value"="newValue"},{"operation"=>"add-system-property","name"=>"test2","value"=>"test2"}]) Argument name '"name"' is not a valid identifier or the format is wrong for the argument list. This one does, so I know the ability to create a dmr ModelNode from a param value is still there. [~] :add-namespace(namespace={"test"=>"test"}) { "outcome" => "success", "result" => undefined, "compensating-operation" => { "operation" => "remove-namespace", "address" => [], "namespace" => "test" } } I think the issue is the parser is searching for indexOf(',') as the way to decide the end of a parameter name/value pair. It's probably going to need to be more of a state-machine kind of thing where chars are read one at a time and trigger state transitions. -- Brian Stansberry Principal Software Engineer JBoss by Red Hat