Err.. Do you have ActiveTCl installed on the system ?
is the location of the file part of your PATH ?
The install directions for ActiveTcl
Linux / Linux x86_64
The download is a tar-gzipped archive. To extract, enter the following command at the shell prompt:
gtar zxf /path/to/ActiveTcl-download.tar.gz
In the directory where you extracted the archive, run the install.sh installer script, which will automatically select between the GUI or text-based installer depending on your system configuration. After installation, make sure that the directory containing the installed executables (ActiveTcl/bin) is included in your PATH variable.
You may be able to find more help here if it's ActiveTcl you are having the issue with.