libvirt users - Jun 2017 - Problems creating a new volume

Hi,
I'm having troubles creating a new storage volume in c++.
This is my code:



    storageVolXml = "<volume>\

      <name>" + name +".img</name>\

      <allocation>0</allocation>\

      <capacity unit=\"G\">" + hd +
"</capacity>\

      <target>\

        <path>" + filePath + "</path>\

        <format type='"+ diskFormatType  + "'/>\

       </target>\

    </volume>";

storageVolPtr = virStorageVolCreateXML(pool,
storageVolXml.toLatin1().data(),
VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA);


I don't have any error but no file is created in the specified path
(filePath).


Any suggestion?


Thanks in advance.