R Error while updating Knime 4.5.1

[salazachou]

Hi @bwilhelm I cannot replicate the error right now since I am at work, I will try to do it at home.

Probably the errors reported in the firsts messages can be useful by the moment

Cheers

[salazachou]

Hi there, I tried the R extensions at home with the 4.5.1 Knime version, but the software ran properly.

Sorry for not being able to replicate the error

[mlauber71]

@bwilhelm I think something is definitly off with the R KNIME integration since 4.5.1 - I had to move several integrations to the community edition in order for them to run:

R Snippet Error on Mac

@victor_palacios It used to work on a Mac with earlier versions of KNIME. H2O.ai would start its own process in the background and it does work with using the R community nodes (regression example, classification example), so it seems to be a ‘communication’ problem between R and KNIME. We had such a thing with KNIME and Python where the progress bar would not work between KNIME and Python and H2O.ai so the solution was to turn it off: Also recently there was some heavy editing going on on t…

does work (R community edition)

H2O.ai AutoML (wrapped with R) with vtreat data preparation in KNIME for...

does not work (R KNIME integration)

H2O.ai AutoML (wrapped with R) with vtreat data preparation in KNIME for...

See the Metanodes for H2O

[bwilhelm]

@pio, Thank you for the log output! It helped me a lot. The MethodNotFoundError suggests that the plugin which contains the DefaultRPreferenceProvider has an incompatible version to the plugin which contains the RConnectionFactory. I will investigate how this can happen.

[pio]

Hi @bwilhelm ,
I have updated my R to the latest version as well, but still the same problem. It doesn’t seem to initialise the R . I have also installed Rserve library and re initialised but no luck so far. At this point I am thinking of reverting back to an older version

[bwilhelm]

Hi @pio,
The only workaround right now is to reinstall KNIME AP in version 4.5.1 (or 4.5.0 as others have stated).
We are working on a fix for the upcoming bugfix release (4.5.2) which should arrive very soon. If you wait for the bugfix release, you don’t have to reinstall KNIME AP but updating will work.

Update: KNIME AP 4.5.2 is released. Updating to 4.5.2 fixes the issue.