ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Handling errors
Class name Description Notes
TypeError The TypeError exception is thrown when the actual
type of an operand is different from the expected
type.
URIError The URIError exception is thrown when one of the
global URI handling functions is used in a way that is
incompatible with its definition.
VerifyError A VerifyError exception is thrown when a malformed
or corrupted SWF file is encountered.
flash.error package Error classes
Flash Player 9 and later, Adobe AIR 1.0 and later
The flash.error package contains Error classes that are considered part of the Flash runtime API. In contrast to the
Error classes described, the flash.error package communicates errors events that are specific to Flash runtimes (such
as Flash Player and Adobe AIR).
Last updated 6/6/2012
A TypeError can be thrown under the following circumstances:
An actual parameter of a function or method could not be
coerced to the formal parameter type.
A value is assigned to a variable and cannot be coerced to the
variable’s type.
The right side of the is or instanceof operator is not a
valid type.
The super keyword is used illegally.
A property lookup results in more than one binding, and is
therefore ambiguous.
A method is called on an incompatible object. For example, a
TypeError exception is thrown if a method in the RegExp class
is “grafted” onto a generic object and then called.
A URIError can be thrown under the following circumstances:
An invalid URI is specified for a Flash Player API function that
expects a valid URI, such as Socket.connect().
When a SWF file loads another SWF file, the parent SWF file can
catch a VerifyError generated by the loaded SWF file.
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