n is either 0, 1, or 2. The default value is 0.
This parameter has been retained for compatibility, but should not be used when building new applications.
The parameter Undefined specifies the behavior when ObjectScript attempts to fetch the value of a variable that has not been defined. The value of Undefined may be 0, 1, or 2:
0 - Always throw an <UNDEFINED> error. (default)
1 - If the undefined variable has subscripts, return a null string, but if the undefined variable is single-valued, throw an <UNDEFINED> error.
2 - Always return a null string.
Changing This Parameter
On the Compatibility page Management Portal (System Administration > Configuration > Additional Settings > Compatibility), in the Undefined row, click Edit. Select the option you want.
Instead of using the Management Portal, you can change Undefined in the Config.MiscellanousOpens in a new tab class (as described in the class reference) or by editing the CPF with a text editor
To change this parameter for a single process only (as opposed to instance-wide), use the Undefined()Opens in a new tab method of the %SYSTEM.ProcessOpens in a new tab class. See the class reference for details.