embedded-trainings-2020/embedded-workshop-book/src/troubleshoot-dongle-flash.md
2020-07-13 17:41:37 +02:00

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# `dongle-flash` not working
``` console
$ dongle-flash loopback.hex
packaging iHex using nrfutil ...
Error: No such file or directory (os error 2)
```
this indicates that `nrfutil`, the Python tool, is not installed or not available in your PATH. Instructions on how to install `nrfutil` can be found in the [setup page](https://oxidizeconf.com/oxidize-global-setup/) and in the top-level README of this repository. If you install `nrfutil` in a virtual environment you'll need to activate the environment; the `nrfutil` binary must be available in your PATH.