Error Starting R
The R session failed to start.
RStudio Version
RStudio 2026.07.1+147 "Pacific Dogwood " (49299327, 2026-07-15) for windows
Session Path
C:/Program Files/RStudio/resources/app/bin/rsession-utf8.exe
[No error available]
[No errors emitted]
Output
[No output emitted]
C:/Users/Dell/AppData/Local/RStudio/log/rsession-Dell.log
2026-08-08T15:40:50.531912Z [rsession-Dell] ERROR system error 10053 (An established connection was aborted by the software in your host machine) [request-uri: /events/get_events]; OCCURRED AT void __cdecl rstudio::session::HttpConnectionImpl::sendResponse(const class rstudio::core::http::Response &) C:\Users\jenkins\workspace\ide-os-windows\rel-mountain-hydrangea\src\cpp\session\http\SessionHttpConnectionImpl.hpp:156; LOGGED FROM: void __cdecl rstudio::session::HttpConnectionImpl::sendResponse(const class rstudio::core::http::Response &) C:\Users\jenkins\workspace\ide-os-windows\rel-mountain-hydrangea\src\cpp\session\http\SessionHttpConnectionImpl.hpp:161
2026-08-09T04:44:09.173572Z [rsession-Dell] ERROR system error 10013 (An attempt was made to access a socket in a way forbidden by its access permissions); OCCURRED AT class rstudio::core::Error __cdecl rstudio::core::http::initTcpIpAcceptor(class rstudio::core::http::SocketAcceptorService &,const class std::basic_string<char,struct std::char_traits,class std::allocator > &,const class std::basic_string<char,struct std::char_traits,class std::allocator > &) C:\Users\jenkins\workspace\ide-os-windows\rel-pacific-dogwood\src\cpp\core\include\core/http/TcpIpSocketUtils.hpp:157; LOGGED FROM: int __cdecl rsessionMain(int,char *const ) C:\Users\jenkins\workspace\ide-os-windows\rel-pacific-dogwood\src\cpp\session\SessionMain.cpp:2617
2026-08-09T04:44:09.173572Z [rsession-Dell] ERROR system error 10013 (An attempt was made to access a socket in a way forbidden by its access permissions); OCCURRED AT class rstudio::core::Error __cdecl rstudio::core::http::initTcpIpAcceptor(class rstudio::core::http::SocketAcceptorService &,const class std::basic_string<char,struct std::char_traits,class std::allocator > &,const class std::basic_string<char,struct std::char_traits,class std::allocator > &) C:\Users\jenkins\workspace\ide-os-windows\rel-pacific-dogwood\src\cpp\core\include\core/http/TcpIpSocketUtils.hpp:157; LOGGED FROM: int __cdecl rsessionMain(int,char *const ) C:\Users\jenkins\workspace\ide-os-windows\rel-pacific-dogwood\src\cpp\session\SessionMain.cpp:2617
Next Steps
R can fail to start up for many reasons. The following may help you resolve the problem:
Investigate any errors above.
Make sure that R starts up correctly outside RStudio (using RGui, R.app, or R in a terminal).
Fully uninstall all versions of R from your machine, and reinstall the version you wish to use with RStudio.
Remove startup customizations such as an .Rprofile file, if present.
If posting this report online, use the Copy Problem Report button below to generate a textual version of this diagnostic.
Further troubleshooting help can be found on our website:
Troubleshooting RStudio Startup
R Session Startup Failure Report
RStudio Version
#version#
user_agent
Error message
#launch_failed#
Process Output
The R session exited with code #exit_code#.
Error output:
#process_error#
Standard output:
#process_output#
Logs
#log_file#
#log_content#