My requirement is : Edit the export file entries ( in hosting filer and vfiler).I got dar file from the WFA community to do this.but only issue is,not showing the volume list.So I did the below changes.
preferences --> User Input --> Volume Input --> Values
I am curious if the vFiler has an volumes in the database. The query that you are using worked during testing in the lab here. Your first User Input query (from original post) should have also worked so that leads me to believe that there might be no volumes associated with the vFiler. Have you confirmed that the vFiler exists in Unified Manager and has associated volumes?