JS Setting MaxObjlistener crashes Max 9.4

Hello,

Am I doing something wrong or is this a bug? If I call my setstep() function in the patch below Max crashes. Code is below I am calling the setvalue method on the MaxobjListener and it works the first time I press the message button to trigger it in the patch, but then it crashes Max if I press it again once or twice.

Thanks,
Richard

var obj;
var objL;



function loadbang(){
gc();
obj = this.patcher.getnamed("pitchslider");
objL = new MaxobjListener(obj, valuechanged);
	}

function bang(){
gc();
obj = this.patcher.getnamed("pitchslider");
objL = new MaxobjListener(obj, valuechanged);


	}
	
	
function valuechanged(data) {
    post("value changed!\n");
    if (data.attrname) {
        post("attrname: " + data.attrname + "\n");
    }
    post("new value: " + data.value + "\n");

	//post(JSON.stringify(data.maxobject))
}

function setstep(){
 

	objL.setvalue([45,16,45,1,12,0,16,59,80,24,24,64,101,4,34,36]);
	
	
}