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LAUNCHXL2-570LC43: Cannot set breakpoints before main()

Part Number: LAUNCHXL2-570LC43


I am running the example hercules_examples/Application/TMS570LC43x_PMU_Demo downloaded from https://git.ti.com/git/hercules_examples/hercules_examples.git

While the code runs and behaves as expected, I am not able to put a breakpoint anywhere before main(), such as in _c_int00(). The breakpoint window shows these breakpoints as HW breakpoint and shows the action as 'halt execution', but the breakpoints are never hit.

What am I doing wrong?