Getting error while quering the odata service

Hi Everyone,

I have used "Query Service(Method => EMPLOYEECOLLECTI_GET_ENTITYSET)"  for update data to backend system and I have written logic in that method from the below link:

http://scn.sap.com/community/netweaver-gateway/blog/2014/03/06/let-s-code-crudq-and-function-import-operations-in-odata-service.

But when I test in SAP NW Gateway Client I am getting below error

Browser showing below output/error

Kindly help me on this

Regards,

Soumya