KB439807: "Error in unclass(x) : cannot unclass an external pointer" error message appears when attempting to open any R script using MicroStrategy deployR ().

• Strategy

This article describes an error message user may encounter when attempting to open any R script using MicroStrategy deployR (). This issue is limited to using the "RGtk" package version 2.20.33. A solution is provided.

SYMPTOM
Users may encounter "Error in unclass(x) : cannot unclass an external pointer" error message when attempting to open any R script in R console using Strategy deployR ().


Error in unclass(x) : cannot unclass an external pointer

CAUSE
This issue is caused by compatibility issues between R and "RGtk" package version 2.20.33.
ACTION
Follow the steps below to resolve the issue:
1) Download "RGtk2_2.20.31.zip" from the attachment below, or the latest "RGtk" package version from https://cran.r-project.org/web/packages/RGtk2/index.html

2) Remove the problematic "RGtk" package from the installation, and re-install the package from the downloaded source file using the below statements respectively:
remove.packages("RGtk2")
install.packages("C:\\RGtk2_2.20.31.zip", repos=NULL,type="source")

3) Re-open R console and launch deployR ()
This issue has been logged as Scopus ID: 230062 KB439807

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Knowledge Article

Published:

March 2, 2018

Last Updated:

November 28, 2018