Adobe FLEX 2-PROGRAMMING ACTIONSCRIPT 3.0 Manual page 274

ActionScript core Error classes
In addition to the core ECMAScript Error classes, ActionScript adds several classes of its own
for ActionScript-specific error conditions and error handling functionality.
Because these classes are ActionScript language extensions to ECMAScript edition 4 draft
language specification that could potentially be interesting additions to the draft specification,
they are kept at the top level instead of being placed in a package like flash.error.
Class name
ArgumentError
SecurityError
VerifyError
274 Handling Errors
Description
The ArgumentError class
represents an error that occurs
when the parameter values
supplied during a function call do
not match the parameters
defined for that function.
The SecurityError exception is
thrown when a security violation
takes place and access is denied.
A VerifyError exception is thrown
when a malformed or corrupted
SWF file is encountered.
Notes
Some examples of argument errors
include the following:
• Too few or too many arguments
are supplied to a method.
• An argument was expected to be
a member of an enumeration, and
was not.
Some examples of security errors
include the following:
• An unauthorized property access
or method call is made across a
security sandbox boundary.
• An attempt was made to access a
URL not permitted by the security
sandbox.
• A socket connection was
attempted to an unauthorized port
number—for example, a port below
1024—without a policy file
present.
• An attempt was made to access
the user's camera or microphone,
and the request to access the
device was denied by the user.
When a SWF file loads another
SWF file, the parent SWF can catch
a VerifyError generated by the
.
loaded SWF