YADE Target FTPS transfer throws ClassCastException if KeepModificationDate=true is used

Current Situation

• If a Target Fragment is an FTPSFragment and the TargetFileOptions->KeepModificationDate option is set to true when:
  • a ClassCastException is thrown

    [<number>][transfer_aborted][Source=<file_path>]java.lang.ClassCastException: com.sos.vfs.ftp.SOSFTPS cannot be cast to com.sos.vfs.ftp.SOSFTP

  • TransferOptions->Transactional
    • true - the entire transfer is cancelled - no files are transferred.
    • false - the files are transferred, but without keeping the modification time of the source file.

Desired Behaviour

• The functionality of YADE should not be affected by the implementation errors.

Test Instructions

• Configure an FTPSFragment as Target Fragment
• Test with TargetFileOptions->KeepModificationDate true or false
• Repeat the tests with an FTPFragment as Target Fragment