Thanks! Works perfectly. While I'm on the subject, I'm curious if you might have any ideas about this. The callback works great for knob changed. In this case, I'm just taking _l_ or _r_ and turning it to _%v_. I was hoping this would also work for when an image sequence is initially loaded but unfortunately it doesn't. Do you know of a way I might be able to have a callback run when a file path is selected when the read node is created?
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