qBittorrent official forums

For weeks I have been experiencing issues with qBittorrent crashing a few seconds after program startup. No matter which version I install, once I transfer the configuration and backup files over, it would crash. I found a few suggestions online and in the forums, but nothing pointed to the *.fastresume files. If I missed such a post, I apologize.

I noticed each *.fastresume file in the BT_backup folder has a *.torrent file to accompany it. I checked the number of files in the folder and the result literally came up odd, which meant there was an extra or missing file. I scanned the list and found a *.fastresume.lxhfiR file. Since the name of the file was identical to another *.fastresume file I deleted the one with the *.lxhfiR extension. Once I restarted qBittorrent, the problem was gone.

I'm guessing the weird extension was caused by not checking "Append .!qB extension to incomplete files" in the Downloads section of the options, which I have since done. qBittorrent was trying to run a *.fastresume file with an unknown extension and it caused the program to crash. Seems fair enough.

Hope this helps anyone else who may be experiencing this.

@nomisuke

Another way to avoid crash is: move torrent files into temp folder on same drive as qbittorrent.
So far it works for me perfectly and i've tested it with torrents that caused always crash before that, like new tv shows releases.
It might be also because that i moved temp torrent files to SSD from HDD. Maybe qbittorrent cause somekind of bottleneck on HDD.