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IWR6843ISK: hard fault after modification of a file

Part Number: IWR6843ISK

I want to run a slightly modified version of the overhead_3d_peoplecount application.
The program is running in the debugger mode.

I modify one line of comments in the mss_main.c file. Do a build. The build is finished without errors and the pop up windows warns me that the code has changed, asked me to reload. I click ok.
Then the application crashes with a hard fault!
I stop the debugging session, restart the session by Launch Selected configuration. On the group, select 'connect target'.
As the binaries is still in the target (I suppose, no reset button was pressed), I click the green arrow, resume (F8) button. No output is shown, no console..
Pressing the pause button does not result in any action except the Suspended mode in the targets.

The only way to get forward is to start all over again, reset the target with the reset button, relaunch the configuration, reload both cores and press run.
This is not the way I expect the IDE to work. I assume that I mis some steps. Even after reading https://dev.ti.com/tirex/explore/content/mmwave_industrial_toolbox_4_11_0/docs/software_guides/using_ccs_debug.html the problem is not solved.

Can you give me some tips to get working with this CCS IDE?