http://<server>:50000/XMII/WSDLGen/<TrxPath>&OutputParameter=outputXML
This URL is wrong Pooja, You cannot use OutputParameter in URL with WSDLGen.
WSDLGen will only and only give you the wsdl and not the Data.
To get the data, you would need to create a client or a consumer proxy. The client / consumer would then use this wsdl and generate request and response objects.
Looking at the wsdl from your above reply, it looks like the transaction does not have any input or output parameter. To make a paramter as an output parameter you need to create a transaction property and check the output parameter checkbox. Also, you need to map the result to the output parameter.
When you want to consume a transaction as webserivce, you need a client / proxy to get the data. The WSDLGen URL will only give you the WSDL.
Regards
Tufale Ashai