ORA-00600: internal error code, arguments: [26599], [1], [211], [], [], [], [], []

CREATE OR REPLACE function f_callWebService (
               as_serviceUrl      in varchar2,
               as_targetNamespace in varchar2,
               as_serviceName     in varchar2,
               as_portName        in varchar2,
               as_wsMethodName    in varchar2,
               as_parmName1       in varchar2, -- TODO: Update to pass an array of name/value pairs.
               as_parmValue1      in varchar2,
               ---
               as_parmName2       in varchar2, -- TODO: Update to pass an array of name/value pairs.
               as_parmValue2      in varchar2,
               ---
               as_parmName3       in varchar2, -- TODO: Update to pass an array of name/value pairs.
               as_parmValue3      in varchar2
               )
   return varchar2
   is
      cs_soapActionUseKey  constant varchar2(14) := 'SOAPACTION_USE';
      cs_soapActionUseVal  constant varchar2(4)  := 'TRUE';
      cs_soapActionUriKey  constant varchar2(14) := 'SOAPACTION_URI';
      ls_targetNamespace            varchar2(500);
      ls_serviceQname               sys.utl_dbws.qname;
      ls_portQname                  sys.utl_dbws.qname;
      ls_operationQname             sys.utl_dbws.qname;
      ln_service                    sys.utl_dbws.service;
      ln_call                       sys.utl_dbws.call;
      lx_serviceRequest             sys.xmltype;
      lx_serviceResponse            sys.xmltype;
      ls_resultXpath                varchar2(100);                                                  
   begin
                                                                                --
      if as_serviceUrl is null or trim(as_serviceUrl) is null then
         raise_application_error( -20001,
            'Argument not passed exception. Argument: ''as_serviceUrl''');
      end if;
      --TODO: Validate other parameters.
                                                                                --
      -- Append url separator to end if one does not exist.
      ls_targetNamespace := as_targetNamespace;
      if substr(ls_targetNamespace, length(ls_targetNamespace), 1) != '/' then
         ls_targetNamespace := ls_targetNamespace || '/';
      end if;
      --
      -- Initialize the service components.
      --
      ls_serviceQname := sys.utl_dbws.to_qname(
         name_Space    => ls_targetNamespace,
         name          => as_serviceName);
                                                                                --
      ls_portQname := sys.utl_dbws.to_qname(
         name_Space    => ls_targetNamespace,
         name          => as_portName);
                                                                                --
      ls_operationQname := sys.utl_dbws.to_qname(
         name_Space    => ls_targetNamespace,
         name          => as_wsMethodName);
                                                                                --
      -- Create the service and call objects.
      ln_service := sys.utl_dbws.create_service (
         service_name   => ls_serviceQname);
      --
      ln_call := sys.utl_dbws.create_call (
         service_handle => ln_service,
         port_name      => ls_portQname,
         operation_name => ls_operationQname);
                                                                                --
      -- Set values on the call object.
      sys.utl_dbws.set_target_endpoint_address(
         call_Handle   => ln_call,
         endpoint      => as_serviceUrl);
                                                                                --
      sys.utl_dbws.set_property(
         call_Handle   => ln_call,
         key           => cs_soapActionUseKey,
         value         => cs_soapActionUseVal);
                                                                                --
      sys.utl_dbws.set_property(
         call_Handle   => ln_call,
         key           => cs_soapActionUriKey,
         value         => ls_targetNamespace
                           || as_wsMethodName);
                                                                                --
      --
      -- Create service request xml.
      --
      lx_serviceRequest := sys.xmltype(
         '<' || as_wsMethodName || ' xmlns="' || ls_targetNamespace || '">'
         ||   '<'||as_parmName1||'>'|| as_parmValue1 ||'</'||as_parmName1||'>'
         ||   '<'||as_parmName2||'>'|| as_parmValue2 ||'</'||as_parmName2||'>'
         ||   '<'||as_parmName3||'>'|| as_parmValue3 ||'</'||as_parmName3||'>'
         || '</' || as_wsMethodName || '>');
         --dbms_output.put_line(lx_serviceRequest.getclobval());
          
      --
      -- Call the service.
      --
      BEGIN
         lx_serviceResponse :=
          sys.utl_dbws.invoke(ln_call, lx_serviceRequest);
      EXCEPTION
      WHEN OTHERS THEN
      return sqlerrm;
      END;      
      
      sys.utl_dbws.release_call (call_handle => ln_call);
      sys.utl_dbws.release_service (service_handle => ln_service);
      
      --return lx_serviceResponse.getstringval();            
      
      return extractResult(lx_serviceResponse, ls_targetNamespace, as_wsMethodName,'VARCHAR2');
      exception
      when others then
      --raise_application_error(-20111,sqlerrm);
      return sqlerrm;

   end f_callWebService;

        select f_callWebService(
         'http://192.168.1.141/webservice/Service1.asmx?WSDL',
         'http://tempuri.org/',
         'Service1',
         '',
         'GetAmount',
         'p_brcod',
         '3555',
         --
         'p_actcod',
         '101',
         --
         'p_acno',
         '123240'
         ) from dual;