Error: Fatal error: A1023E: File "../../build/mul_asm.NUCLEO_F401RE.E" could not be opened: No such file or directory 1 Error, 0 Warnings

Getting this error when trying to call an assembly file to multiply 2 numbers. I have the file in the directory so I am not sure why it can’t find it.

Hello Chase,

  • Do you build with the ARM or GCC_ARM toolchain?
  • Which revision of Mbed-OS do you use?
  • What is your build tool? Is it the Mbed Studio IDE or the mbed-cli (Mbed command line interface)?
  • Have you tried to use the .S extension for the assembly source file name?