Forum: System Workbench for STM32

Error: recipe for target 'startup/startup_stm32f407xx.o' failed while building in sw4stm32

I am getting the error while building the stm32 project in sw4stm32 ide:
recipe for target ‘startup/startup_stm32f407xx.o’ failed

ac6 toolchain is correctly installed.
What can I do to solve this?