RStudio fails to load

RStudio IDE
,
1

Error Information:

Description of issue -
RStudio failed to load

Attempted steps taken to fix -
Deleted RData, RProfile, etc., where found

System Information:

  • RStudio Edition: (Desktop or Server) 2025.05.1+513
  • RStudio Version:
  • OS Version: Sequoia 15.5
  • R Version: 4.5.1
  • Output your diagnostics report (if possible):
  • No errors. Log follows:

R Session Startup Failure Report

RStudio Version

RStudio 2025.05.1+513 "Mariposa Orchid " (ab7c1bc7, 2025-05-30) for macOS

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2025.05.1+513 Chrome/132.0.6834.210 Electron/34.5.1 Safari/537.36

Error message

[No error available]

Process Output

The R session exited with code 1.

Error output:

[No errors emitted]

Standard output:

[No output emitted]

Logs

/Users/elliottmiddleton/.local/share/rstudio/log/rsession-elliottmiddleton.log

2025-06-01T01:15:34.102159Z [rsession-elliottmiddleton] ERROR CLIENT EXCEPTION (rsession-elliottmiddleton): ;|||rstudio-0.js#-1::new dye|||rstudio-0.js#-1::new eN|||org/rstudio/studio/client/server/remote/RemoteServer.java#1458::isPackageInstalled|||rstudio-0.js#-1::new Ksf|||org/rstudio/core/client/hyperlink/RunHyperlink.java#68::getPopupContent|||org/rstudio/core/client/hyperlink/Hyperlink.java#53::run|||com/google/gwt/user/client/Timer.java#124::fire|||rstudio-0.js#-1::eval|||com/google/gwt/core/client/impl/Impl.java#296::apply|||com/google/gwt/core/client/impl/Impl.java#335::entry0|||rstudio-0.js#-1::eval|||Client-ID: 33e600bb-c1b1-46bf-b562-ab5cba070b0e|||User-Agent: Mozilla/5.0 (Macintosh  Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2025.05.0+496 Chrome/132.0.6834.210 Electron/34.5.1 Safari/537.36
2025-06-01T01:15:34.102159Z [rsession-elliottmiddleton] ERROR CLIENT EXCEPTION (rsession-elliottmiddleton): ;|||rstudio-0.js#-1::new dye|||rstudio-0.js#-1::new eN|||org/rstudio/studio/client/server/remote/RemoteServer.java#1458::isPackageInstalled|||rstudio-0.js#-1::new Ksf|||org/rstudio/core/client/hyperlink/RunHyperlink.java#68::getPopupContent|||org/rstudio/core/client/hyperlink/Hyperlink.java#53::run|||com/google/gwt/user/client/Timer.java#124::fire|||rstudio-0.js#-1::eval|||com/google/gwt/core/client/impl/Impl.java#296::apply|||com/google/gwt/core/client/impl/Impl.java#335::entry0|||rstudio-0.js#-1::eval|||Client-ID: 33e600bb-c1b1-46bf-b562-ab5cba070b0e|||User-Agent: Mozilla/5.0 (Macintosh  Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2025.05.0+496 Chrome/132.0.6834.210 Electron/34.5.1 Safari/537.36

From RStudio Desktop Will Not Start on support.rstudio.com

2

If you open a terminal and start R (not RStudio) there, does R run properly?

3

Yes, I can start R from Applications and it brings up a console window.

4

I have reset the state of RStudio by deleting the indicated folder and I get a blank error page.

5

I have also reinstall R and RStudio to latest updates. This is quite frustrating. Luckily, I have an M3 where both are working, but this is depriving me of a computer.

6

If you run rstudio --run-diagnostics (or whatever the Mac version of the command is) in a terminal, it should write a text file somewhere and tell you in the terminal where to find the file. Does that file contain any error messages that are more informative than what you initially posted?

7

I did screen record to capture the message the flashed during opening: "R encountered a fatal error while opening. Session terminated." Opening from Terminal just takes me to the same screen.

8

No diagnostics. And remember, my R runs just fine!

9

"No diagnostics" meaning the file is not written, or meaning the file is written but contains nothing of interest?

R running is useful to know, but I've seen reports of R working but RStudio being blocked from communicating with it due to a firewall or something else getting in the way of RStudio communicating with R (I think). I was hoping the text file would identify something like that if it were happening.

Also, just to leave no stone unturned, are R and RStudio running under the same user account with the same file access?

10

Yes, same user. It has to be something in the way RStudio asks for R.

11

The only thing I can think of (and I realize you have already done some or all of this, but possibly not all at once) is the following:

  • uninstall both R and RStudio;
  • delete any configuration files left behind by R:
  • delete any state files left behind by RStudio (as discussed here);
  • reinstall R and confirm it runs;
  • reinstall RStudio and hope for the best.
12

R Session Startup Failure Report

RStudio Version

RStudio 2025.05.1+513 "Mariposa Orchid " (ab7c1bc7, 2025-05-30) for macOS

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2025.05.1+513 Chrome/132.0.6834.210 Electron/34.5.1 Safari/537.36

Error message

[No error available]

Process Output

The R session exited with code 1.

Error output:

[No errors emitted]

Standard output:

[No output emitted]

Logs

/Users/elliottmiddleton/.local/share/rstudio/log/rsession-elliottmiddleton.log

2025-08-03T02:18:36.262029Z [rsession-elliottmiddleton] DEBUG Beginning session: e86c5c35 with activityState:  for username: elliottmiddleton effective uid: 501
2025-08-03T02:18:36.942525Z [rsession-elliottmiddleton] DEBUG Begin /rpc/client_init for client: 33e600bb-c1b1-46bf-b562-ab5cba070b0e: initialized: 0 resumed: 0
2025-08-03T02:18:36.942525Z [rsession-elliottmiddleton] DEBUG Begin /rpc/client_init for client: 33e600bb-c1b1-46bf-b562-ab5cba070b0e: initialized: 0 resumed: 0


            Finally got the debug to run in Terminal
13

SUCCESS! And I have to thank ChatGPT for leading me through 3 hours of bash commands making sure that RS was pointing to the correct R 64-bit executable, after rebulding the preferences and environment. Apparently on the M1s RS can have trouble finding the correct binary.

Troubleshooting RStudio Fatal Error on M1 Mac (Apple Silicon)

1. Check RStudio Architecture

Run in Terminal:
file /Applications/RStudio.app/Contents/MacOS/RStudio

Should show support for both x86_64 and arm64 (universal binary)

2. Identify Real R Binary and Check Architecture

cat /usr/local/bin/R

Find the actual R binary path, typically:

/Library/Frameworks/R.framework/Resources/bin/R

cat /Library/Frameworks/R.framework/Resources/bin/R

This points to the executable here:

/Library/Frameworks/R.framework/Resources/bin/exec/R

file /Library/Frameworks/R.framework/Resources/bin/exec/R

Confirm architecture: should be 'Mach-O 64-bit executable arm64' for Apple Silicon

3. Reset RStudio Config and Cache (to remove corrupt settings)

mv ~/.config/rstudio ~/.config/rstudio_backup
mv ~/.local/share/rstudio ~/.local/share/rstudio_backup
mv ~/.cache/rstudio ~/.cache/rstudio_backup
rm -rf ~/Library/Application\ Support/RStudio
rm -rf ~/Library/Preferences/com.rstudio.desktop.plist

4. Disable Potentially Problematic Startup Files

mv ~/.Renviron ~/.Renviron_backup
mv ~/.Rprofile ~/.Rprofile_backup

5. Check and Fix Permissions on R Executable

ls -l /Library/Frameworks/R.framework/Resources/bin/exec/R

If not executable, run:

sudo chmod +x /Library/Frameworks/R.framework/Resources/bin/exec/R

6. Launch RStudio from Terminal to Check for Errors

/Applications/RStudio.app/Contents/MacOS/RStudio

If RStudio starts without fatal errors, problem resolved.

Notes:

  • If R is not arm64, reinstall R from CRAN's Apple Silicon build:
    R for macOS

  • After reinstall, update or create ~/.Renviron to point to the correct R binary:
    echo 'RSTUDIO_WHICH_R="/opt/R/arm64/bin/R"' >> ~/.Renviron

  • Restart your Mac after changes to ensure clean environment.

Summary:

  • Verified both RStudio and R are Apple Silicon native.
  • Reset user configs and caches to avoid corrupt settings.
  • Disabled startup files that might cause conflicts.
  • Ensured proper permissions on R binary.
  • Successfully relaunched RStudio without fatal errors.
1 Like
14

New problem: RStudio can't load data when the working directory is set to the one where the data file is:

================================================================================

S&P 500 LASSO Gain Prediction Model - FIXED VERSION

Predicts 7%+ gains over next 6 months using LASSO logistic regression

================================================================================

Load required libraries

library(tidyverse) # Data manipulation and visualization
library(glmnet) # LASSO regression
library(caret) # Cross-validation and model evaluation
library(pROC) # ROC curves and AUC
library(lubridate) # Date handling
library(gridExtra) # Multiple plots
library(ggplot2) # Advanced plotting
library(zoo) # For rolling window functions

Set seed for reproducibility

set.seed(42)

================================================================================

1. DATA LOADING AND PREPROCESSING

================================================================================

cat("Loading S&P 500 and macroeconomic data...\n")
Loading S&P 500 and macroeconomic data...

Load data

data <- read.csv("monthly.csv", stringsAsFactors = FALSE)
Error in file(file, "rt") : cannot open the connection
In addition: Warning message:
In file(file, "rt") :
cannot open file 'monthly.csv': No such file or directory

15

I suggest making this a new question. Also, assuming that the working directory is set to the home of the data file (not visible in your code excerpt), does changing the file to "./monthly.csv" in the read.csv function help?

16

I solved this by unchecking Save Rdata and one other thing in Tools Global Options

17

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