This configuration variable determines whether custom scopes are allowed. The possible values for this variable are on and off.
For more details about custom scopes, see Chapter 8 of the User's Guide.
When set to false, an error is generated if an application file uses a variable scope that is not one of the built-in variable scopes in Tango (that is, method, instance, local, user, cookie, domain, application, or system scope).
A system scope value of off for this configuration variable overrides an application scope value of on. For more information, see "Tango Applications" in Chapter 24 of the User's Guide.