Hi @NickFot ,
From my end, I've tested the condition with "NaN" (without quotes) and it worked fine. Another option that also worked is to set the expression string('NaN').
I know that it is kind of a repetitive method, as "NaN" should be already a string, but let's see if it works for you 🙂
Let me know if it works for you or if you need any additional help!
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