Message Arguments is undefined on Load

Hi,

I have an issue on getting the message argument from subscribe that the argument is undefined. I want to get the message from page on initialize if status is "On Processing" so I can able to hide or lock columns to a details on load.

Here is the publish from the Page:

				esq.getEntity(recordId, function(result) {
					if (!result.success) {
						// For example, error processing/logging.
						this.showInformationDialog("Data query error");
						return;
					}
					var status = result.entity.get("Status");
 
					if(status.displayValue === "Order Processing"){
						this.set("ButtonVisible", false);
					}
					debugger;
					if(status.displayValue !== "Draft"){
						this.sandbox.publish("CheckOrderDraft", {IsDraft: false}, []);
					}else{
						this.sandbox.publish("CheckOrderDraft", {IsDraft: true}, []);
					}
 
				}, this);

Here is the subscribe on Detail:

 

			init: function(){
				this.callParent(arguments);
				debugger;
				this.sandbox.registerMessages(this.messages);
				this.processMessages();
 
			},
			processMessages: function(){
				debugger;
				this.sandbox.subscribe("CheckOrderDraft", this.onCheckOrderDraft(), this, []);
			},
			onCheckOrderDraft: function(arg){
				if(!arg){
					debugger;
					this.set("canDistributorEdit", false);
				}
			}