This looks so weird that I felt curious enough to sift through the source further.
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The Python IBAPI source does not contain text 'manualOrderCancelTime' at all so it totally escapes me how it could even throw an error message that you quoted, featuring this text. B
eside all this, the error message itself does not follow from anything I see in the API source code.
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That said, in Java and C# API that same argument is named 'manualOrderCancelTime'. But Python API is not dependent on either.
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Pretty mind-boggling to say the least, and I still have only questions, no answers...
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Best,
DS
