[Errno 24] Too many open files on Linux Mint 19.1

[MMF2]

I have the following ~/.config/bups/config.json:

{ "dirs": [ { "exclude": [ "/home/matthias/LM17_home", "/home/matthias/Ubuntu12_home", "/home/matthias/Dokumente", "/home/matthias/Daten", "/home/matthias/.cache", "/home/matthias/.gvfs", "/home/matthias/.dbus" ], "path": "/home/matthias", "onefilesystem": false, "name": "home-matthias", "excluderx": [] } ], "mount": { "path": "/media/matthias/BUP_4TB/backups", "type": "", "encrypt": false, "target": "", "options": "" } } Starting the backup with bups I get the error

Traceback (most recent call last): File "/usr/lib/bup/cmd/bup-save", line 241, in File "/usr/lib/bup/bup/index.py", line 461, in filter File "/usr/lib/bup/bup/index.py", line 431, in iter File "/usr/lib/bup/bup/index.py", line 370, in iter File "/usr/lib/bup/bup/index.py", line 370, in iter File "/usr/lib/bup/bup/index.py", line 369, in iter File "/usr/lib/bup/cmd/bup-save", line 228, in wantrecurse_pre File "/usr/lib/bup/cmd/bup-save", line 225, in already_saved File "/usr/lib/bup/bup/git.py", line 676, in exists File "/usr/lib/bup/bup/git.py", line 669, in _require_objcache File "/usr/lib/bup/bup/git.py", line 579, in _make_objcache File "/usr/lib/bup/bup/git.py", line 425, in init File "/usr/lib/bup/bup/git.py", line 523, in refresh File "/usr/lib/bup/bup/git.py", line 552, in open_idx File "/usr/lib/bup/bup/git.py", line 384, in init File "/usr/lib/bup/bup/helpers.py", line 762, in mmap_read File "/usr/lib/bup/bup/helpers.py", line 752, in _mmap_do mmap.error: [Errno 24] Too many open files

Also, I get the error /home/matthias/.gvfs: [Errno 13] Permission denied: '.gvfs' even though I tried to exclude the path "/home/matthias/.gvfs". Is there something wrong with my exclude syntax?

I have installed the latest bups (0.8.1) on Linux Mint 19.1. Before, I have worked for years with bups on Linux Mint 17.3 without any problems. However, I use the exclude option for the first time in Linux Mint 19. Thank you for clarification.