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MetaTrader 4 runtime error code

MetaTrader 4 runtime error code: ERR_UNKNOWN_SYMBOL (4106)

The error, as text you can copy

ERR_UNKNOWN_SYMBOL
Code number
4106
Kind
Runtime error code
Where you meet it
Raised inside the platform's own language
API
MetaTrader 4 (MQL4)

What does ERR_UNKNOWN_SYMBOL (4106) mean on the MetaTrader 4 API?

"Unknown symbol" is MetaQuotes' whole description of this code. It is an MQL4 runtime error code, returned by GetLastError().

Risk warning: CFDs and spread bets are complex instruments and come with a high risk of losing money rapidly due to leverage. You can lose money on these products, and each provider publishes its own loss figure under FCA rules. You should consider whether you understand how they work and whether you can afford to take the high risk of losing your money. Automated and API trading can amplify losses through bugs, connectivity failures and runaway orders.

Independent and unofficialdocs.mql4.comchecked

How do I fix ERR_UNKNOWN_SYMBOL (4106)?

Check the symbol name passed to the function. The vendor's page gives no further remedy.