Unable to mount (error 252)

[rosch100]

While trying to mount a RaspberryPi Ext partition, I receive error 252:

2016-05-28 17:01:01: fuse-ext2 script invoked with command line "/System/Library/Filesystems/fuse-ext2.fs/fuse-ext2.util" "-m" "-o" "nodev" "-o" "noowners" "-o" "nosuid" "/dev/disk2s2" "/Volumes/Untitled" 2016-05-28 17:01:01: Invoking user: root 2016-05-28 17:01:01: [Mount] Entering function Mount... 2016-05-28 17:01:01: [Mount] Processing argument "/dev/disk2s2" 2016-05-28 17:01:01: [Mount] Processing argument "/Volumes/Untitled" 2016-05-28 17:01:01: [Mount] Got plain device "/dev/disk2s2" 2016-05-28 17:01:01: [Mount] Got raw device "/dev/rdisk2s2" 2016-05-28 17:01:01: [Mount] Invoking: 2016-05-28 17:01:01: [Mount] "/usr/local/bin/fuse-ext2.wait" "/Volumes/Untitled" "5" "/usr/local/bin/fuse-ext2" "/dev/disk2s2" "/Volumes/Untitled" "-oauto_xattr,defer_permissions,local" 2016-05-28 17:01:01: [Mount] /usr/local/bin/fuse-ext2.wait returned with retval: 252 2016-05-28 17:01:01: [Mount] ERROR: Mounting /dev/disk2s2 as /Volumes/Untitled failed! Output: fuse-ext2: version:'0.0.7', fuse_version:'27' [main (../../fuse-ext2/fuse-ext2.c:324)] fuse-ext2: enter [do_probe (../../fuse-ext2/do_probe.c:30)] fuse-ext2: Error while trying to open /dev/disk2s2 (rc=2133571396) [do_probe (../../fuse-ext2/do_probe.c:34)] fuse-ext2: Probe failed [main (../../fuse-ext2/fuse-ext2.c:340)] 2016-05-28 17:01:01: [Mount] Exiting function mount...