Oracle Jdeveloper 12c problem generate TopLink DB WebService

Hi.

I'm trying to create a wsdl via the wizard in jdev 12c.

When I create the WSDL, after finding the package to DB, I return the empty schema and in the log message I find:

Nov 15, 2017 11:19:45 AM org.eclipse.persistence.tools.dbws.DBWSBuilder logMessage

WARNING: No packages were found matching the following: [IMPGOI.IMPGOI_IMP_PEG_MIS_GRD_WS]

Nov 15, 2017 11:19:45 AM org.eclipse.persistence.tools.dbws.DBWSBuilder logMessage

WARNING: No procedures were found matching the following: [IMPGOI.IMPGOI_IMP_PEG_MIS_GRD_WS.IMPORT_DATI]

This is the return schema in eclipselink-dbws-schema.xsd

<?xml version="1.0" encoding="UTF-8"?>

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://project1/Project1_TopLinkPlSqlProviderService">

   <xsd:complexType name="simple-xml-format">

      <xsd:sequence>

         <xsd:any minOccurs="0"/>

      </xsd:sequence>

   </xsd:complexType>

</xsd:schema>

Thanks.