Expected type for argument in if function is bool

[dhtbrowne]

Hey team,
I keep getting this error:

Error in field: phone . The expected type for 2 argument in the if function: bool . You have passed: string .

This is the field:

I’m wanting it to be if phoneNumber = null (bool) or null (string) then enter the results from the previous node. Else enter other results.

I’m guessing I’m using the operator incorrectly here somehow?

[SatoU]

the issue is here:

129.phoneNumber = null or null

The problem is that the second null isn’t part of a proper condition. It’s just a raw value, not a comparison. The system expects the entire condition to return true or false, but this breaks that logic.

That’s why the if function throws an error — it doesn’t receive a valid boolean expression as the first argument.

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Try rewriting it like this:

129.phoneNumber = null or 129.phoneNumber = "null"

Now both parts are full comparisons:

• The first checks if the value is actually null
• The second checks if the value is the string "null"

And then place this expression inside your if() like this:

if(129.phoneNumber = null or 129.phoneNumber = "null"; 160.phone; 129.phoneNumber)

This way, the condition will work correctly, and the if function will return the right value based on whether the phone number is missing.