onerror()

The execution of function onerror() will be triggered when an exception occurs. This function does not support strategies written inPython and C++. The onerror() function can take a msg parameter, which is the error message that is reported when the exception is triggered.

function main() {
    var arr = []
    Log(arr[6].Close)  // A program exception is intentionally raised here.
}

function onerror(msg) {
    Log("error:", msg)
}

# not supported by python

// not supported by C++

init() Strategy Framework and API Functions