Error: A1163E Unknown Opcode R0, expecting opcode or Macro with instruction in the left column

Question

Today I've been getting this error in my code stating:

RTE\\Device\\STM32F407VGTx\\startup_stm32f407xx.s(191): A1163E: Unknown opcode R0, expecting opcode or macro

Here is the area of code where it stops at:

I have not performed any assembly in the code that I have written, which seems like a common reason why this message appears. Would anyone be kind enough to help me troubleshoot this issue? This is my first time programming with an STM32F4 board, so I am not entirely sure where to begin looking :(

Answer 1

我从查看代码中休息了一下，当我回来时，我在 LDR 语句之前随机按了 TAB，代码现在可以成功编译，0 错误和 0 警告！