appimage creation broken

[MartinX3]

Somehow it runs in a never ending loop.
If I stop it, I see in the written appimage file:

^@libnotify.so.3^@libnotify.so.4^@libnotify.so.5^@libnotify.so.6^@libnotify.so.7^@libnotify.so.8^@Failed to open libnotify.
^@notify_init^@AppImage^@notify_notification_new^@notify_notification_show^@^@^@^@^@notify_notification_set_timeout^@%s: ftw error: %s
^@Failed to remove %s: %s
^@Failed to remove directory %s: %s
^@Unexpected fts_info
^@Error getting realpath for %s
^@%s.%s^@Portable %s directory created at %s
^@Error creating portable %s directory at %s: %s
^@AppImage options:

  --appimage-extract [<pattern>]  Extract content from embedded filesystem image
                                  If pattern is passed, only extract matching files
  --appimage-help                 Print this help
  --appimage-mount                Mount embedded filesystem image and print
                                  mount point and wait for kill with Ctrl-C
  --appimage-offset               Print byte offset to start of embedded
                                  filesystem image
  --appimage-portable-home        Create a portable home folder to use as $HOME
  --appimage-portable-config      Create a portable config folder to use as
                                  $XDG_CONFIG_HOME
  --appimage-signature            Print digital signature embedded in AppImage
  --appimage-updateinfo[rmation]  Print update info embedded in AppImage
  --appimage-version              Print version of AppImageKit

wxmaxima-x86_64.AppImage.zip