What is NSXMLParserErrorDomain error?

I am getting this parser error while acces开发者_StackOverflowsing the server url

Parser Error : Error Domain=NSXMLParserErrorDomain Code=5 "Operation could not be completed. (NSXMLParserErrorDomain error 5.)"

What does this mean ?

Thanks

According to the documentation, this error means:

NSXMLParserPrematureDocumentEndError

The document ended unexpectedly.

Available in Mac OS X v10.3 and later.

Declared in NSXMLParser.h.