The calling jQuery object.
String describing the type of error that occurred.
optional exception object, if one occurred.
When a Documents Library Service call fails for any reason, the Promise object returned from
that method will call its
fail handler. The arguments provided to a function registered in the fail handler are the jQuery jqXHR object
(a superset of the XML Http Response object), a statusText string, and an errorThrown string.
If the error occurred within the Documents Service, all three of these parameters should have values. If the error occurred while parsing or
delivering the data (and thus was not the fault of the service), only
errorThrown, the third argument, will have a value.
If a UploadFile service call was
aborted using the special
abort method, all of the parameters to the
fail callback will be null.
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