For the benefit of those members that do use Python with the TWS API (and Jürgen surely with over 6,000 members I cannot be the only one, and therefore this has relevance to those members), I used the following method which works nicely.
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# create the OrderCancel object
order_cancel = OrderCancel()
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# add an empty string for manualOrderCancelTime to the object
order_cancel.manualOrderCancelTime = ""
# pass the object as the second parameter
self.cancelOrder(orderId, order_cancel)
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Also DS, to clarify, I did indeed use square brackets as a symbolic notation of passing a single integer value as the OrderID, rather than this being the syntax of the code that would represent a list in Python.
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As this was the last issue in my 6000+ line program that I so naively developed using a copy-and-paste approach, I am most pleased that the program now works perfectly and is rendering excellent daily results.?
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Thank you all for your input.
