Cant sell all my stocks using API

Using the API I can sell a partial stock, but when I try to sell all my remaining stock which is exactly 12.09032128 shares using the api It is rejected with the message:

T212 RESPONSE {“success”:false,“error”:{“type”:“/api-errors/quantity-precision-mismatch”,“title”:“Error while placing the order”,“status”:400,“detail”:“invalid quantity precision 4”

I have tried different precision levels but keep getting this message.