error while loading shared libraries: libXm.so.4:

Ubuntu only provide the obsolete libmotif3 version and the not the current version 4 that the receiver is built against.

The easiest solution is to install libmotif3 and then run

sudo ln -s /usr/lib/l

ibXm.so.3 /usr/lib/libXm.so.4

Which will make the version 3 library appear as the version 4 one. Not ideal but it seems to work.