Hello. I hope this email finds you well.In windows, I cannot read files that have a path-length longer than 256. I never had this issue on Mac. I am aware of Wondows MAX_LENGTH parameter, and I've changed my registry to enable long paths (LongPathsEnabled). I've also made the necessary changes to my group policy (see https://docs.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=cmd) However, R still gives me trouble when reading or writing files that exceed a length of 256. It appears that software API need to actively opt-in to allow long paths (Add longPathAware to the app manifest on Windows ? Issue #7986 ? rust-lang/cargo ? GitHub<https://github.com/rust-lang/cargo/issues/7986>). Please pass this message along to inquire if R has done so. All the best, Luke Klein | Statistician/Technical Advisor I Monitoring, Evaluation and Learning (MEL) team Act to End NTDs | West Program<https://www.actntdswest.org/> 1825 Connecticut Avenue, NW |Washington, DC 20009 T: +1 (949) 412-9079 | lklein at fhi360.org<mailto:lklein at fhi360.org> Sent from my iPhone. Please excuse any typos. [[alternative HTML version deleted]]