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nRF52 DK - radio not functional

I am using nrfgo studio ver 1.20.0.2 s132_nrf52_1.0.0-3.alpha_softdevice.hex nrf52832_xx_aa_s132.hex supplied by Nordic (ble_app_template) emIDE 2.20

The firmware runs with the LED flashing every second but no blue tooth at all. I have tried more than one cell phone. I have other bluetooth devices with which to verify.

When I compile the ble_app_template and test I get the same results.

Trapping through the program I find that when the routine "sd_softdevice_enable" is called, the program ends at "app_error_handler". The former routine is where the Supervisor Call (SVC) with value #16 is executed.

What am I doing wrong?. I am quite sure the softdevice and application are programmed correctly. I can change the blink time of the LED, compile and load successfully. What are the chances of hardware failure? Please help

Have traced the problem to routine "sd_nvic_EnableIRQ" returns error code 0x08 NRF_ERROR_INVALID_STATE.

What do I need to do? Regards

Ian

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