Sorry for the double post but I wanted to let you know that I finally found the cause of this issue. It was related to the added by me in Configuration > Presets > Stock > WMT record that in some strange way interferes with the buy limit orders done by the API for WMT stock but not for the orders done by hand from the TWS. After removing this preset everything started working as expected. Unfortunately I have no time to figure out which parameter exactly was the issue but in case someone else have the same problem: you have to check also the presets in the configuration. Even though the logs in both sides show no problem with the requested price, the error message is misleading and must include information what exactly is wrong with the requested limit price.
