This configuration variable specifies a path to a file on the Tango Server machine. Tango uses the contents of this file as the error message returned to a user whenever an error condition occurs within an application file (unless you have specified Error HTML within the application file itself).
The default error file is error.htx. This file is in HTML format and may contain meta tags. You can edit the file with a text or HTML editor.
You can set different default error files for Tango applications by assigning to this variable in application scope.