How to manage an CompositeType Array ?

I have an CompositeType of (String,HostSystem,Number, boolean, etc)

And i want manage an Array, but im getting an error when i set the values.

This is my composite type

This is my workflow output array

This is my Script Out warray

They are binded.

This is my script, xml parse works fine.

I'm getting this error

item: 'Parse XML/item1', state: 'failed', business state: 'null', exception: 'TypeError: Cannot set property "VM_Name" of undefined to "DB_NAME" (Workflow:Parse XML / Parser Script (item1)#67)'

DB_NAME is the name in the XML I'm parssing.

Thanks!