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MSPM0C1104: MSPM0C1104 cant upload SW and also cant preform factory reset

Part Number: MSPM0C1104

Tool/software:

Hi , I am trying to use the MSPM0C1104SDDFR SOT-8 version in my project (SEDG R&D). 
During development stage I also use the LP-mspm0c1104. 

The issue arise from the fact that we need to use the SWC,SWD pins but we don't want to lose SW upload option for good.
From reading in the docs I understand that if I make a SW  POR (SYSCTL_RESETLEVEL_LEVEL_POR) it reconfigure the SWD,SWC pins for serial debug. 
unfortunately after trying an test code to make a POR , the device (that operated the code as expected) stopped reacting and when i try to upload SW i get  a "DAP Connection Error". 

Trying to preform a "factory reset" using the "MSPM0_Factory_Reset_Tool" seems to fail (due to the same DAP issue) then how can i make the factory reset?.
how can i regain SWD with the MC ?
and also what is the best method of avoiding getting locked out when i want to use the SWD,SWC pins?


thanks for your support!