Migrating BSSV from 8.11 to 9.1

Hello,
We have migrated our custom BSSV's from 8.11 (JAX-RPC) to 9.1 (JAX-WS). The BSSV's were build and deployed successfully to WLS.

However, when we run one of the custom BSSV from SoapUI it returns the below message -

<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
   <S:Body>
      <ns2:Fault xmlns:ns2="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns3="http://www.w3.org/2003/05/soap-envelope">
         <faultcode>ns2:Server</faultcode>
         <faultstring>Conversion = s, Flags = #</faultstring>
      </ns2:Fault>
   </S:Body>
</S:Envelope>

Regards,

Rahim