Hi Ruslan: To make sure I understand...If I want to write my code in the Windoze enviroment I must use the 1.9.8 made for Windoze and Realbasic. otherwise (which is my case) I can use 1.9.8 for Carbon, as I program exclusively in the macOSX enviroment and only compile to run on Windoze machines. Is this correct? Chuck