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There is invalid fill in Expert Tab got solution but dont know what to do further

I want to ask question that There is invalid fill in Expert Tab i got solution but dont know what to do further.That is where to put this coding.I saw this link https://www.mql5.com/en/docs/constants/errorswarnings/enum_trade_return_codes 10030 TRADE_RETCODE_INVALID_FILL Invalid order filling type