Ok, I’ve looked into this a bit more, including stepping through the VBA with the debugger, and unfortunately I can see that the suggestions I made are not going to work, and the code change I alluded to won’t help either.

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When you install the API, it installs a library called ddedll.dll in your Windows folder. This is used under the hood by the DDE mechanism to communicate with TWS. It may well be that this library needed to be amended to filter out these unsupported order attributes, or something. And maybe the version of the API you’re using doesn’t have that update (by which I mean you may need a newer API version).

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So which API version are you using? If less than 10.10 (which was the API version where these attributes were de-supported), I suggest you uninstall that one and then install 10.19, and try that. The legacy sample still has these unsupported attributes , but just leave them blank.

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Then if you still have the problem, I think you’ll have to contact IB.

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