Remember that  is a special character in Tcl. 

This is a problem because Windows uses a backslash for separating directories, while Unix uses a forward slash. 

So, in Tcl and in the Tcl shell, wish, you need to enter directories and paths with either two backslashes, e.g., \, or with the
Unix-style forward slash, e.g., /. 

For example, don`t use: 

$dir$filename

Use either: 

$dir\$filename

or: 

$dir/$filename

You can use the file join command to put file and directory names together using the native format.