AxisFault SAXParseException; Premature end of file

I got the following Exception as a response from a webservice.

The file xml is well valide and well formed.

AxisFault faultCode: {http://ift.tt/sVJIaE}Server.userException faultSubcode: faultString: org.xml.sax.SAXParseException; Premature end of file. faultActor: faultNode: faultDetail: {http://ift.tt/1f4HjAN}stackTrace:org.xml.sax.SAXParseException; Premature end of file.

the SAXParseException lineNumber = -1 and ColumnNumber = -1

i searched a lot about this error but there is no solution.