n is either 1 (true) or 0 (false). The default value is 0.
Normally, when InterSystems IRIS® data platform encounters an extremely large number (on the order of 1.0E147, or -1.0E146), it throws the <MAXNUMBER> error. When TruncateOverflow is enabled, the <MAXNUMBER> error is suppressed.
For more information, see the Extremely Large Numbers section of the “Data Types and Values” chapter in Using ObjectScript.
Changing This Parameter
On the Compatibility page of the Management Portal (System Administration > Configuration > Additional Settings > Compatibility), in the TruncateOverflow row, click Edit. Select TruncateOverflow to enable this setting.
Instead of using the Management Portal, you can change TruncateOverflow 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 TruncateOverflow()Opens in a new tab method of the %SYSTEM.ProcessOpens in a new tab class. See the class reference for details.
$DOUBLE function in ObjectScript Reference.