CCS: CCS6 - step over doesn't work

Tool/software: Code Composer Studio

Hi all,

i am working on a new platform with TM4C129X and an Blackhawk USB 560V2 debugger and with CCS  6.1.3

I  wrote a application using TI-RTOS with Tasks and Interrupts. Everything works fine when running free or run to breakpoints or 'run to here'.

But I have a problem when I try debugging within a task with 'step over'. Instead stepping over a sourcecode line,  I fall into ti_sysbios_family_arm_m3_Hwi_dispatch__I:  in the file Hwi_asm.sv7M

I can step through this function and everthing works fine, but I cannot step over!

Any ideas?

Thank you in advance