Adding suffix or prefix to instance name for multiple components

[dezmo]

Please read this how to post your code properly:

[How to] Post correctly formatted and colorized code on the forum?

Continuing the discussion from Ruby backtick returns nothing!: Triple backtick delimiter lines. What is a backquote ? [image] Backquote character key on US keyboard. If it is error message text (or some other plain text that contains <, >, #, or other characters that can confuse Discourse markdown,) then specify “text” as a lexing language: ```text paste error message here ``` If it is Ruby, then: ```ruby # code here ``` If it is Javascript, then: ```javascript /* js…

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We will understand better your problem, if you also include what Error message you see on Ruby Console when you are executing your code.

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I assuming a syntax problem in your code: perhaps you are using quotation marks which is not the right one…

Does this work if I copy-paste it?

prefix= "WT01"
model = Sketchup.active_model
selection = model.selection
selection.each do |instance|
  instance.name = "#{prefix}_#{instance.name}"
end