tixati portable
installed in c:\someir\tixati_dir

transfers -> metainfo -> save a torrent file in this folder
somehow entry become corrupted:
instead of absolute path like "c:\downloaded_torrent_files"
it become "\ \..\..\downloaded_torrent_files"

so when tixati tries to save downloaded torrent files to that dir, it fails and crashes
editing entry from relative to absolute path helps

Something similar happened to me. I use Tixati 2.17a2 portable on dual boot machine with Ubuntu and Windows 8. I keep all my downloads on two NTFS drives, they are named D: and E: by Windows. I mainly use Ubuntu, so I made symbolic links /D: and /E: to point to those drives, so I could use the same Tixati for both systems. My Tixati_portable folder is located on the /D:/Programy/Tixati_portable/.

When I first run v2.17a2, half of my transfers lost their path, status column was "Unable to open file: There's no such file or folder" (the second part is translated from local language). All transfers' paths to D: drive changed to "/../../path_to_download_folder" (the /D: was replaced by /../../). The rest of transfers on the E: drive was OK. I corrected this manually.