hi...I'm new at arm and keil. I had some codes which are written using Stdphd at STM32F4XX_DFP ver.1.0.8. when I want to use CubeMX ,software packs of keil is changing and it want to install DFP ver.2.14.0 . After that installation, I can't use/complair my old codes. I can use old code after uninstall 2.14.0. I want to know that it is possible to use 2.14.0 and 1.0.8 versions together at same time. And sometimes after uninstallation my codes give error again like as error: #35: #error directive: "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"