Create Candidate Referral using Merge-and-refer-candidate-by-candidate and Webservices

Summary:

We are trying to create a candidate referral in Taleo, using the operation Merge-and-refer-candidate-by-candidate via Taleo webservices.

Error:

Soap: Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">soap:Client
A problem occurred while deserializing the parameter referrerCandidate at the position index 1

The operations accepts two paramenters, one is the candidate details (changeset), the other is the reference primary key of the referrer (candidateid, emailid,employeenumber)

Content (please ensure you mask any confidential information):

WE are able to create the candidate and also the referral details if we are passing the candidate id of the referrer, however, we would like to use employee number instead as a standard practice, as in HCM system employeeid, exists and employeeid to candidate id mapping is not available.