What CF Version are you targeting?

[NathanStrutz]

What version of ColdFusion are you targeting?

If you are targeting CF9+, you could make those getters & setters implicit, doing away with a lot of the code here.

[wellercs]

Originally, I wanted to have a broader target audience, but I branched off a pre-CF9 version and updated the current master version to use the implicit getters and setters. Thanks for the suggestion! It does make a lot less code moving forward.

[NathanStrutz]

Much better, lots smaller.
You have long-handed your properties, but you can shorthand them like this:

property any Data;
property numeric ErrorCode;

The getter is created automatically because you have accessors="true" so you don't need to specify that. Also required attributes aren't usually helpful, especially if they are set to false.