The scintilla project's CVS data is in read-only mode, so the project may have switched over to another source-code-management system. To check, visit the Project Summary Page for scintilla and see if the menubar lists a newer code repository, such as SVN or Git.
The CVS data can be accessed as follows.
You can run a per-module CVS checkout via pserver protocol:
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P ScintillaNET
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P ScintillaVB
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P SciteNet
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P SciteVBNet
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P dmapp
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P extlua
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P gtkscintilla2
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P icons
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P scintilla
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P scintillactrl
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P scite
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P sinkworld
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P split_vector
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P test-scite
cvs -z3 -d:pserver:anonymous@a.cvs.sourceforge.net:/cvsroot/scintilla co -P wince
You can view a list of files or copy all the CVS repository data via rsync (the 1st command lists the files, the 2nd copies):
rsync -a a.cvs.sourceforge.net::cvsroot/scintilla/
rsync -ai a.cvs.sourceforge.net::cvsroot/scintilla/ /my/local/dest/dir/
If you are a project admin for scintilla, you can request that this page redirect to another repo on your project by submitting a support request.