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Undefined reference to HAL & The selection cannot be launched

Question asked by Arnas Matiukas on Feb 2, 2018
Latest reply on Mar 20, 2018 by Jeanne Joly

Hello everyone, i guess this is not the right place to ask, but official Atollic TrueSTUDIO forum gave me no answers. Maybe someone here had same problem as me. 

Yesterday i moved from Keil to TrueSTUDIO IDE since it is free for STM32. After base code generation using STM32CubeMX i can't get over the error after building Debug. It does not find reference to any HAL and FreeRTOS functions. If i try to build Release the errors does not appear. Also then i try to RUN my project i get "The selection cannot be launched, and there are no recent launches.". What could be wrong?

P.S I am junior developer and never used debugging tools. Does Debug build and run is just as same as flash + use of debug tools?