Problems implementing R in Knime

[millainthesky]

Hi everyone,
I have a problem with the implementation of R in Knime. I downloaded the version 3.6.1 of R and I did all the procedures for implementing the software in Knime, but every time I use the R nodes in Knime they give me this two errors:
-ERROR R Source (Table) 3:300 Execute failed: R evaluation failed.: “knime.out[1:150,5]” (outside the node)
-ERROR: Could not execute internal command.ERROR: R evaluation failed.: "sapply(ls(),function(a)class(get(a,envir=globalenv()))[1])"ERROR: R evaluation failed.: "sapply(ls(),function(a)class(get(a,envir=globalenv()))[1])"ERROR: eval failed (inside the node).

Could you help me?
Thank you,
Camilla

[Aswin]

Dear Camilla

Not sure if this helps, but I remember getting similar errors when I was trying to use an account-specific installation of R instead of the systemwide R on my Linux system. I could not figure out how to fix the problem, so I went back to the system R, and then it worked again. So, if you are working under Windows, installing R as admin may perhaps solve the problem

Or you could wait for advice from more knowledgeable people…

Good luck
Aswin

[mlauber71]

You could read this entry and see if it can help you with KNIME and R:

Install R alongside KNIME on Windows and MacOS

Over the last months I have collected a few entries about the installation of R alongside KNIME that contain some maybe useful hints how to overcome certain obstacles while installing them. I want to bring them together here. (If you are looking for a basic guide about how to install R in the first place you might look here or here). A few maybe unnecessary remarks upfront. Yes it takes some effort to get KNIME and R up and running but in the end you will be rewarded with the whole world of pos…

how to import tables from .docx documents via R snippet

Not exactly sure what you mean by installed by both R and RStudio. Typically you should only have one R installation with one library. You could try and check your version’s library with this comand: .libPaths() The error messages hint that you do not have the relevant package docxtractr installed. And you will have to install RServe in the latest version. One thing I had success wit recently is described here: https://forum.knime.com/t/integrating-r-with-knime/17291/6?u=mlauber71 After you…

Or maybe you could provide us with more information about your environment. You might use this workflow to get insights:

check version of R packages in KNIME – mlauber71

[millainthesky]

Thank for your answer!
I solved the problem thanks to your help! I was missing some packages to install and now I managed to connect R a Knime.
Camilla