Kernel not found

dot101

So when i run the R recipe i get this error :

Job failed: environment variable DKURBIN not defined

And when i open the code in the notebook it shows this :

Kernel not found

Could not find a kernel matching R. Please select a kernel

How can i solve this ?

Thanks in advance.

Sergey

Hi @dot101

This most probably means that your R subsystem is installed in a place where DSS cannot find it (in particular: not in the system's default search PATH for commands)

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This is unfortunately something that is known to happen on MacOS, especially when you start DSS with the Finder app.

Details of this issue would be:

- you have installed R somewhere on the system. On MacOS, there are various possible sources for this, with various installation locations (eg /usr/local/bin, /opt/local/bin, etc)

- somehow, this install location was added to your command-line session initialization file ($HOME/.profile, $HOME/.bash_profile or equivalent) so that it is added in the PATH environment variable upon command-line shell startup

- as a consequence, if you run the DSS installer, or "dssadmin" post-install command, or even start DSS from a shell window, it inherits this PATH setting and can find R

- on the contrary, if you start DSS from the Finder app, the shell initialization profile files are not loaded, this PATH entry is not defined, and DSS cannot find R anymore

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You can fix that with the following:

- open a shell session, and look up the install location for R with: "which R"

- you can even test that if you restart DSS from this command line session, as in:

/Users/<user>/Library/DataScienceStudio/dss_home/bin/dss restart

it should now find R and be able to launch R recipes and notebooks

- you can force DSS to use a given location for R by defining the following in file <DSS_DIR>/bin/env-site.sh :

# Adjust this to point to the result of "which R" above

export DKURBIN=<result_of_which_R_command>

- you need to restart DSS to take this modification into account