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NRF52840 DK Hardfault

Received our 52840 DK, loaded, via nRF Go Studio, s140_nrf52_7.0.1_softdevice.hex. Loaded, via IAR Workbench, ble_app_blinky_pca10056a_s140. I clicked to go button and whamo, right to Hardfault exception. Call stack shows main->ble_stack_init->nrf_sdh_enable_request->HardFault. Interestingly enough, if I load s132 softdevice the blinky, and all other, examples work as expected.

what gives?

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