NSXMLParserErrorDomain in Objective C?

I have set up a local server using XAMPP. I am making a request to the PHP pages , but i am getting an error as below:

"Parser Error : Error Domain=NSXMLParserErrorDomain Code开发者_运维技巧=5 "Operation could not be completed. (NSXMLParserErrorDomain error 5.)"

What is this error due to ?

Thanks

NSXMLParserPrematureDocumentEndError The document ended unexpectedly. Try to trace loaded data to console before parsing