Error: object ‘knime.in’ not found

[sw1336]

Hello - I am getting a ‘knime.in’ not found error when I try to test R. I have R 3.4.0 and latest KNIME versions. I get the same error with R v3.6.x.

knime.out ← knime.in is all I am testing.

Does anyone know how to fix this?

Thanks.

[mlauber71]

Could you make sure your version and setup of KNIME and R is up and running?

KNIME R Snippet node is not working fine in the latest version of macOS (Big Sur 11.2.3)

@mariaangelesjs welcome to the KNIME forum. If you encounter problems with R and KNIME and MacOSX there are more articles and hints to explore: The error sounds like some paths might be missing. Did you follow all the hints from the official KNIME and R guide and can you check which versions of the named packages you have. You can check your installation here. If the code does not work in KNIME/R maybe you try to check the versions in RStudio.

The new KNIME 4.4 offers an environment propagation for R via conda, although I have not yet found an example I could offer:

https://www.knime.com/whats-new-in-knime-44#conda-r

And frankly I would have to do more experimentation with the

https://hub.knime.com/knime/extensions/org.knime.features.python2/latest/org.knime.python2.nodes.conda.CondaEnvironmentPropagationNodeFactory

In oder to realise the full potential.

[gonhaddock]

Hello @sw1336
Did you manage to fix the error?
Some common missing when trying to run R from KNIME, besides fixing the path to R home, that I am assuming it is done to get the error…

Then other common misses are to install a couple of packages that are required in your R CRAN console or RStudio:

> install.packages("Rserve") 
> install.packages("rJava")

NOTE.- ‘Rserve’ is referred in the the ‘official KNIME and R guide’ linked by @mlauber71, however i didn’t see ‘rJava’ in the document

I hope this can help to fix the error

[sw1336]

Hi @gonhaddock - thank you for following up. Yes, managed to get it to work. I was trying to read a location and Path columns. Once I changed Path to string (I needed the path of the files), then it worked.

Thanks.