can not insert breakpoint in .c except main.c when debugging

I have a strange problem:all the .c can compile、build、run、download correctly, and there is no error, but when debugging, I can insert breakpoint only in main.c, cannot insert breakpoint in any other ...
can not insert breakpoint in .c except main.c when debugging

I have a strange problem:all the .c can compile、build、run、download correctly, and there is no error, but when debugging, I can insert breakpoint only in main.c, cannot insert breakpoint in any other ...
Can't set breakpoints

I am working with the Nordic board PCA10040 using Keil V5.23.0.0. After updating the JLink firmware (requested) Keil stopped allowing breakpoints. I installed latest Segger software 6.30 and it didn...
Can't set breakpoints

I am working with the Nordic board PCA10040 using Keil V5.23.0.0. After updating the JLink firmware (requested) Keil stopped allowing breakpoints. I installed latest Segger software 6.30 and it didn...
C51: debugger can't stop at specified breakpoint statement

Hi, when i trace the code by step using the debugger, the debugger sometimes failed stopping at the breakpoint but go through the breakpoint statement, causing the debugging procedure more difficult...