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DFU Update says zip file not supported

rider

I'm trying to apply a firmware update using a zip file that has worked with older version of nRF Toolbox. Using the current version, (4.1.1) on iOS, I select DFU, then select my zip file under User Files. When I press Done, I get a popup saying "DFU -- Selected file is not supported".

Any ideas what to do? It's not my file, and I didn't have any development role, so I'm just trying to figure out how to apply the update.

Any help would be really appreciated.

The zip file: IRT_V2_REV_A1_C_1_0_39.zip

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    Since the hex-file is named application, then Its fair to assume that the image is an application image. Hence, you shoud select application when you're promted to to selct the image type. If the dat.file (also referred to as the init packet) is required you will not be able to perform the update without it, but in some older SDKs it is optional. Worst case scenario is that the old application is erased, but then you should still be able to retry the update since the bootloader and softdevice is still present.

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    Since the hex-file is named application, then Its fair to assume that the image is an application image. Hence, you shoud select application when you're promted to to selct the image type. If the dat.file (also referred to as the init packet) is required you will not be able to perform the update without it, but in some older SDKs it is optional. Worst case scenario is that the old application is erased, but then you should still be able to retry the update since the bootloader and softdevice is still present.

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