Robin Shen [28/Sep/11 03:14 AM] Sorry this is already possible in QB3.1, to modify an user attribute, please run below script in a step on QB server: [code]groovy: def node = grid.getNode("matrix:8811"); def userAttributes = node.userAttributes; userAttributes.put("attribute1", "value1"); node.setUserAttributes(userAttributes, true);[/code] You may also read the user attributes from an external file and parse it to construct a Groovy map, then call method node.setUserAttributes(map, true);