If you install duplicati on OMV for arm (raspbian), you can receive Out or memory errors.
You can test the Duplicati error doing a backup or running the mozroot.exe to import a key.
[root@databananaberry:~]# /usr/lib/duplicati/mozroots.exe --import --machine --sync
mozroots, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
WARNING: mozroots is deprecated, please move to cert-sync instead.
Downloading from 'https://hg.mozilla.org/releases/mozilla-release/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt'...
WARNING: Read more...