/usr/lib/x86_64-linux-gnu/libdap.so.25 is in libdap25 3.19.1-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libdap.so.25.0.1
/usr/lib/x86_64-linux-gnu/libdap.so.25.0.1