Error when closing portion of a position less than 1

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Error when closing portion of a position less than 1

Hi, I noticed that the API does not allow to close portion of a position less than 1 and obvoisly greater than 0.
Example: I may have 1 position open and would like to close 0.1 of that postion which would leave me with with a 0.9 position open, if I choose to close 0.1 of the postion then API doesnt allow this, whereas in your IG apps this is allowed.

Not sure if I am doing soemthing wrong or is this just not allowed or limited by the api capability?

please advise.

thanks