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Stopped by vector catch : nrf52840 (s340 6.1.1)

Hi,

I have looked at a number of posts with respect to this error, but I still could not work out my issue.

Board: nrf52840dk (PCA10056 2.0.1, 2020.37)
SES: 5.50a and 5.34a
SDK: 17.02

Project: Receive Bike Power via ANT+ (with the s340 softdevice), then  transmit some of it back over UART.  This is part of a larger project on the 9160dk and then Thingy91.

All was running great, I had all the ANT+ code working and then got the UART code working, as individual projects.  Then I tried to merge the code - which is when I started to get the Stopped by vector catch issue and could not proceed.  Since then I have rolled back all the changes (or I think I did), but I still get this same issue - and no sure how to proceed.

I have tried the following with no success;
* Installed the new version of SES - 5.50a
* Installed the SDK in a new directory to start fresh - nRF5_SDK_17.0.2_d674dde
* Re-Installed the ANT header files (tired 7.1.1 and 6.1.1)
* cleaned and rebuilt projects from scratch
* Erase All - from nrf connect (to makes sure all is clean)

The examples/peripheral/uart example still works, but it appears anything to do with the softdevice doesnt, as I have tried /examples//ant/ant_message_types/master/pca10056/s340 and examples/ble_peripheral/ble_app_hrs/pca10056/s340.

After loading the new projects, I confirmed they were loaded on the devices, as the memory locations (after reading with nrf connect) were different, when I switched between projects.

I am at a loss as to what to try next - could there be anything cached in SES which is causing some corruption?

regards
-brett

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