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Help, how to pass the dash in io function

代码1：
var a = exchanges[i].IO("api", "POST", "/v1/me/cancelallchildorders?product_code=FX_BTC_JPY");
 Log(1,a);  

代码2：
 var name = 'FX_BTC_JPY';
 var message = "product_code=" + name;
 var a = exchanges[i].IO("api","POST","/v1/me/cancelallchildorders",message);
 Log(2,a);
 
 程序无法撤单，反馈如下：

  请问，问题是不是出在下划线上，IO函数用过好多次了，没有出现过这种错误，请指教一下，谢谢

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The grassThis is a list of all the exchanges[i].IO (("api","POST","/v1/me/cancelallchildorders",""), JSON.stringify (({product_code:"BTC_JPY"})); I've tested this, and I've got feedback.

Inventors quantifiedCode 2 is used correctly, or the product name is incorrect. See if the corresponding product name in Market List is entered incorrectly.

ttxcIt's done, without using this interface, withdrawal is done according to the ID of the individual withdrawal.

ttxcI tried it with your code. The following is the error message: This is a list of all the different ways Futures_OP 4: 400 is credited in the database. In addition, I got a position, and with the following code, there was no error, which seems to be a problem with the exchange: This is a list of exchanges[i].IO (("api", "GET", "/v1/me/getpositions", "product_code=FX_BTC_JPY");

ttxcThe name should be right, because I can order with IO, or I can't withdraw.