Thanks for the suggestion Robby but no luck, I'm afraid. DrRacket gives the error below. Although it then claims to complete the installation, the server button doesn't appear even after a restart.
From the error message it seems that gnu-unzip expects the first two bytes of the file to be #o037 and #o213. Looking at the .plt file, I can see that they are indeed those values. Any idea? Breanndán gnu-unzip: bad header context...: /Applications/Racket v6.0/collects/file/gunzip.rkt:866:2: do-gunzip exception raised by error escape handler: continuation application: attempt to jump into an escape continuation; original exception raised: gnu-unzip: bad header not an unpackable distribution archive context...: /Applications/Racket v6.0/collects/setup/unpack.rkt:274:7 /Applications/Racket v6.0/collects/setup/setup-core.rkt:197:13: for-loop /Applications/Racket v6.0/collects/setup/setup-core.rkt:59:0: setup-core /Applications/Racket v6.0/collects/setup/setup.rkt:56:3 exception raised by error escape handler: continuation application: attempt to jump into an escape continuation; original exception raised: not an unpackable distribution archive Installation complete. >>>>> "Robby" == Robby Findler <ro...@eecs.northwestern.edu> writes: Robby> Is he giving a URL to DrRacket? If so could there be something Robby> operating at the network layer (a proxy maybe) that gets in the Robby> way? Robby> A simple thing to try is visit the URL in a browser, save the Robby> file and then give DrRacket the path to the file (in that same Robby> dialog box). Robby> Robby Robby> On Wednesday, April 2, 2014, Breanndán Ó Nualláin Robby> <b...@science.uva.nl >> wrote: Robby> This semester I set up a handin server and all my students Robby> are using it ...except for one. Robby> When he tries to install the prepared plt file via "Install Robby> .plt file", DrRacket gives the complaint "gnu-gunzip bad Robby> header". Does anyone have a pointer to what the problem might Robby> be? Robby> He's using DrRacket v6.0.0 on a Mac. Robby> The plt file installs successfully for all other students on Robby> a range of Mac, Windows and Linux environments. Robby> Thanks, Robby> Breanndán Robby> ____________________ Racket Users list: Robby> http://lists.racket-lang.org/users ____________________ Racket Users list: http://lists.racket-lang.org/users