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MetaTrader 4 trade server return code

MetaTrader 4 trade server return code: ERR_INVALID_ACCOUNT (65)

The error, as text you can copy

ERR_INVALID_ACCOUNT
Code number
65
Kind
Trade server return code
Where you meet it
Returned by the trade server to the platform
API
MetaTrader 4 (MQL4)

What does ERR_INVALID_ACCOUNT (65) mean on the MetaTrader 4 API?

"Invalid account" is MetaQuotes' whole description of this code. It is a MetaTrader 4 trade server return code, returned by GetLastError() in MQL4.

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

No fix in the source

The vendor's page gives no remedy. It lists the code with a one line description and nothing more.

That is all the source says, so this page does not invent a fix. General guidance: the other trade server return codes recorded for MetaTrader 4, and the error lookup for the exact text of the reply you received.