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I recently upgraded R to 3.4.3 and RStudio to 1.1.383. After installation I got the <p> R encountered a fatal error.</p>The session was terminated bug.

I've followed the instructions here on fixing startup problems, this similar question on stack overflow, and other RStudio support forums and none have been able to fix the error.

  • My R version is running fine in the terminal and is the most recent version
  • When I remove the ".rstudio-desktop", ".Rpofile", and ".Rhistory" files and start Rstudio it no longer uses my themes but now encounters a "Fatal Session" bug but when I restart my session it just keeps getting the bug.
  • I've restarted my computer and re-installed Rstudio with no luck with anything.

I've included a diagnostic report here; there are a decent number of errors but I'm not sure what they really mean.

Any help would be greatly appreciated.

Matt Mills
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    how did you upgrade to R?    Also, what OS are you on? If on Mac OSX, make sure to install R from the maintained package file. Either way, fully removing and reinstalling R would likely be helpful here – Ricardo Saporta Dec 13 '17 at 20:08
  • Maybe Ctrl + Click On RStudio and choose the right version of R. – M-- Dec 13 '17 at 20:09
  • @RicardoSaporta I'm on Mac OS 10.13.2. What do you mean by "maintained package file"? I just downloaded the latest version of R (3.4.3) from the r-project website. My computer is picking up the new version in the Terminal and plain R. – Matt Mills Dec 13 '17 at 20:41

1 Answers1

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I was able to fix this by deleting the R and Rstudio apps, the R frameworks, and the rstudio-desktop folder and reinstalling both apps.

Matt Mills
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