Single line simple mq4 documented function not working

External question — Stack Overflow Stack Exchange Author: Andy Thompson Original post: https://stackoverflow.com/questions/64480481 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. The following simple script is producing no output: void OnStart() { Print(SymbolName(1, false)); } The log file entries are as follows: 2 11:35:32.112 Script scratch USDCHF,M1: loaded successfully 2 11:35:34.147 Script scratch USDCHF,M1: removed The marketwatch is as per the screenshot: what am I missing??