Syntax Help: groovy.lang.MissingMethodException: No signature of method: java.lang.String.active() is applicable for argument types: () values: []

[kevintierney]

This idea from @tgauchat may work

try

settings."${deviceName}".active()

How to append variable on device name?

OK… I think I’ve got it…***, but I’m not sure “exactly” what your SmartApp is doing, so you’ll have to test… Your original lines… @spencejs: "bulbs${n}"*.setLevel(bulbNewValue.level) "bulbsOn${n}"*.on() "bulbsOff${n}"*.off() Change this to: settings."bulbs${n}"*.setLevel(bulbNewValue.level) settings."bulbsOn${n}"*.on() settings."bulbsOff${n}"*.off() Quite a small change, right? Since the Preferences are actually stored in a Map called settings, you “need” or “can” refer to the full Map name when referencing the Devices. By using the “settings” Map name, the string expansion appears to work correctly. I notice that I did this in one of my SmartApps before, and didn’t recall why … but I figured I had a reason. Please let me know if this works.