Run-Time Errors 

var blg:String = "foo";
var big:Sprite = new Sprite();
var error:int = big.length(); 

import flash.display.Sprite;
var sprite1:Sprite = new Sprite();
var q:String = sprite1.stage.quality;

var obj:Object = new Object();
obj.a = "foo";
trace(obj.b.prop);

You can also see this error because of a mispelling, for example in the following, where mc represents a MovieClip object on the display list, and the stage property is misspelled with a capital S (it should be stage):

trace(mc.Stage.quality);

This error also appears for out-of-range assignments, such as the following:

var m0:int = 2147483648; // int.MAX_VALUE == 2147483647

You can also see this error when using the bitwise left shift operator (<<). For example, consider the following code:

var m0:uint = 0xFF;
var m1:uint = m0<<24;

The result of left shift operator (<<) is interpreted as a 32-bit two's complement number with sign. In the example, the result is a negative value, which causes the error when assigned to the uint typed property. A workaround is the following:

var m0:uint = 0xFF;
var m1:uint = uint(m0<<24);

• If you are using the setConversionMode() or setEnabled() method, ActionScript 3.0 replaces these methods with the access property.
• If you are using the doConversion() or setComposition() method, these methods are not supported for Macintosh OSX.

• A description with Windows file extensions only
• A description with Windows file extensions and Macintosh file formats.

The two file formats and not interchangeable; you must use one or the other. For more information, see the FileFilter class in this language reference.

a.addChild(b);
b.addChild(a);

• SQLIndexSchema
• SQLTableSchema
• SQLTriggerSchema
• SQLViewSchema

• SQLTransactionLockType.DEFERRED
• SQLTransactionLockType.IMMEDIATE
• SQLTransactionLockType.EXCLUSIVE

• SQLMode.READ
• SQLMode.UPDATE
• SQLMode.CREATE