Most demos are not working using Tcl/Tk 9.0.2 because of encoding problems. They work fine using Tcl/Tk 8.6.17.

Example read_blocking_webpage.tcl:

error reading "sock166e23c4e30": invalid or incomplete multibyte or wide character while executing "read $ch 4096" (procedure "read_blocking" line 18) invoked from within "read_blocking $host $port $path $protocol" invoked from within "save_file "read_blocking_webpage.txt" [read_blocking $host $port $path $protocol]" (file "read_blocking_webpage.tcl" line 65)

I just tried them with TCL 9.0.2 on MS Windows and they worked. Maybe it needs the channel -profile option too.

I also tried on OpenSuSE Linux Leap 16.0 with 8.6.17 and 9.0.2 and no issues. What OS and version are you using?

The errors occur on ex. Windows11, Debian 12.6 and SuseLeap 15.6.

If changing the following line in demo read_blocking_website.tcl

chan configure $ch -blocking 1 -buffering line -buffersize 16384 -encoding utf-8 -translation {auto crlf}

to

chan configure $ch -blocking 1 -buffering line -buffersize 16384 -encoding utf-8 -translation {auto crlf} -profile tcl8

the demo works on above mentioned systems using Tcl 9.0.2 and tls2.0b2.