Why there is an error when debugging the FFT and matrix multiplication functions in cmsis library ?

[MHass.2]

I try to implement an FFT on the STM32F429I controller. I succeeded in accessing cmsis files and compilation worked fine by including arm_math.h and libarm_cortexM4lf_math.a. in CubeIDE Version: 1.8.

However, when I try to debug the program, it goes into the HardFault_Handler().

If I execute the program in singel stepping (pressing F5), I get the following information:

Can't find a source file at "C:\CMSIS\CMSIS_Setup_V4.xx\CMSIS\DSP_Lib\Source\GCC/../TransformFunctions/arm_rfft_q15.c" 

[AScha.3]

the ***.a lib is compiled, not source.

so you cannot see the source, because there is no source code.