toFixed: so Ubuntu = no error - so Raspberry = error

General
1

Hi,
I have one pc with ubuntu to test my code
and one Raspberry (so raspberry) for my home automation.

Why this simple function

const pay = Number(msg.payload.toFixed(1));

in Ubuntu is ok and in Raspeberry show this error ?

TypeError: msg.payload.toFixed is not a function
2

Because the payload is NOT a number on your PI flows.
Simple to verify with a debug node BEFORE the function.

3

It's a temperature value, I thought it was a numeric value, not string ....
Thank you very much (and thanks for your patience) ....