I am trying to access a wsdl file and getting following error. Can somebody
please help me and tell me what this error means and how can I find out what
null is?

Thanks in advance
[RPC Fault faultString="Error #1009: Cannot access a property or method of a
null object reference." faultCode="EncodingError" faultDetail="null"]
at
mx.rpc.soap::Operation/http://www.adobe.com/2006/flex/mx/internal::invokePending
Call()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\so ap\Operation.as:774]
at
mx.rpc.soap::Operation/send()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\so
ap\Operation.as:688]
at Function/http://adobe.com/AS3/2006/builtin::apply()
at
mx.rpc.soap.mxml::Operation/send()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\r
pc\soap\mxml\Operation.as:167]
at Function/http://adobe.com/AS3/2006/builtin::apply()
at
mx.rpc::AbstractService/http://www.adobe.com/2006/actionscript/flash/proxy::call
Property()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\Ab stractService.as:28
5]
at
MonitoringStats/___MonitoringStats_Button4_click()[C:\Projects\mailroomStatistic
s\src\flex\MonitoringStats\MonitoringStats.mxml:24 3]