If TWS allows a connection from your version of the API then the
attributes themselves are supported. It's particular values of the
attributes that are no longer accepted so setting to False is the
right thing to do.
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This is untested,
but since the two attributes are unsupported, I feel comfortable
just setting them to False when I create the order object.
```
order_object = self.create_order(order)
order_object.eTradeOnly = False
order_object.firmQuoteOnly = False
```
The error messages went away.
