Thanks for clarifying! It sounds to me like the solution might be much much simpler than re-installing an earlier version of racket. Here’s what I recommend.
1) Delete all of the “compiled” subdirectories in your development path. 2) run “raco setup”. It seems likely to me that this will solve the problem you’re seeing, and is very unlikely to break anything that’s not currently broken. There are other more complicated or refined versions of this, but at the end of the day, this error is probably solved by just moving the offending file out of the way. John > On Apr 13, 2021, at 5:16 PM, Don Green <infodeveloper...@gmail.com> wrote: > > I have several versions of racket installed on Ubuntu linux at default linux > locations. > I think I should uninstall them all. > Then after downloading a PPA from the racket web site > install the version I want to a single directory. (I would be downloading > version: 7.8) > Does this sound like a plan sound okay? > > I gather from the comments I have received from John Clements, that he > suspects I am having some sort of problem that is motivating the desire to > return to an earlier version > of Racket. > > I believe the problem is where I have placed my racket code files. > I've been putting off moving them and would like to continue putting off > moving them. > > I inadvertently upgraded to Racket v8.0 a couple of days ago. > > Welcome to Racket v8.0 [cs]. > > (current-library-collection-paths) > '(#<path:/home/don/.plt-scheme/4.2.1/collects> > #<path:/home/don/.racket/8.0/collects> > #<path:/usr/share/racket/collects/>) > > My code files all begin here: /home/don/.plt-scheme/4.2.1/collects/... > > Racket error message when I run: > $ my-prog > read-compiled-linklet: version mismatch expected: "8.0" found: "7.8" in: > /home/don/.plt-scheme/4.2.1/collects/DG/all/a/b/fn/filename-from-path-and-filename/compiled/filename-from-path-and-filename_ss.zo > > So, since my compiled file was compiled under Racket version 7.8, there is a > mismatch since the Racket now installed is Racket v. 8.0. Thus the reason > I'd like to return to running Racket v. 7.8. > Thanks for your advice. > Don > > > > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/134d170b-500d-4959-b842-6d4713329ffdn%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/16be474f-ca60-480f-af73-6b6c5e9a4cc9%40mtasv.net.
