Debugging C-code in Arm D Suite v1.2

Hi,

I have a problem with debugging C source in AXD debugger. Every time when I
lunch debugg, debugger is disassembing code to asm and I can not to switch
to c-code and con not step in c-code. Maybe I don't check some options? but
which??
With Asm I have no problems ;).
If you have any ideas, solutions please write.

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Best Regards,
Griva