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J721EXCPXEVM: Debug c7x with CCS

Ghassen souissi
Prodigy 230 points

Part Number: J721EXCPXEVM

Tool/software:

Hello,

I created an application on c7x core and I used CCS to debug it.

But I have these messages at every Step Over press:

C71X_0: Trouble Reading Register 'General Purpose'.D15: (Error -1044 - (0:128:0)) The debug probe reported an error. Confirm debug probe configuration and connections, reset the debug probe, and retry the operation. (Emulation package 12.6.0.00029) 
C71X_0: Trouble Reading Register General.RP: (Error -1344 - (0:0:0)) Register or Memory request has failed due to a Transaction Error.  This may be the result of reading from a write only register, writing to a read only register, or accessing a memory location that is not assigned. No user action required. (Emulation package 12.6.0.00029) 
C71X_0: Trouble Reading Register 'General Purpose'.A11: (Error -1344 - (0:0:0)) Register or Memory request has failed due to a Transaction Error.  This may be the result of reading from a write only register, writing to a read only register, or accessing a memory location that is not assigned. No user action required. (Emulation package 12.6.0.00029) 
C71X_0: Trouble Reading Register 'General Purpose'.A11: (Error -1344 - (0:0:0)) Register or Memory request has failed due to a Transaction Error.  This may be the result of reading from a write only register, writing to a read only register, or accessing a memory location that is not assigned. No user action required. (Emulation package 12.6.0.00029) 
C71X_0: Trouble Reading Register 'General Purpose'.A11: (Error -1344 - (0:0:0)) Register or Memory request has failed due to a Transaction Error.  This may be the result of reading from a write only register, writing to a read only register, or accessing a memory location that is not assigned. No user action required. (Emulation package 12.6.0.00029) 
C71X_0: Trouble Reading Register 'General Purpose'.A11: (Error -1344 - (0:0:0)) Register or Memory request has failed due to a Transaction Error.  This may be the result of reading from a write only register, writing to a read only register, or accessing a memory location that is not assigned. No user action required. (Emulation package 12.6.0.00029) 
C71X_0: Trouble Reading Memory Block at 0xb3204df8 on Page 0 of Length 0x48: (Error -1344 - (0:0:0)) Register or Memory request has failed due to a Transaction Error.  This may be the result of reading from a write only register, writing to a read only register, or accessing a memory location that is not assigned. No user action required. (Emulation package 12.6.0.00029)

I am using 

- J721EXCPXEVM 

- ti-processor-sdk-rtos-j721e-evm-09_01_00_06

- Linker file for my application: the same linker file for c7 in vision_apps

What is the meaning of these messages and how can I resolve it?