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LAUNCHXL-CC1310: amulator XDS110 cant connect to mcu core after first program

Part Number: LAUNCHXL-CC1310

Hallow!

i debug contiki application - example of rime-tsch 

today my launchpad-cc1310 come into unconnectable state that connection test reports:

-----[An error has occurred and this utility has aborted]--------------------

This error is generated by TI's USCIF driver or utilities.

The value is '-241' (0xffffff0f).
The title is 'SC_ERR_ROUTER_SECURE_SUBPATH'.

this happen duing debug - debuger loose connection, possibly via WD reset, maybe on LPM reset error.

after that first loose, only way to program device - via forced mass erase by flash programmer 2

after mass erase, i cat start debug session. but if a stop this session, i can`t  to connect debugger ever. Test connection reports same error -241. no launchpad reconnect, no CCS restart helps.

this connection failure -241 heppens even on working programm - program run, and prints to console, but debuger can`t connect!

Only mass erase again helps to start new debug session. Another board from devKit pair - works fine. 8/

can anybody explayn how to get throught this bug?

maybe theree is some way to start mass erase on debuger connect, before program load?