Frank and I had to play some games with openmotif/grace/medm to get things going again. Basically, the EPEL repo should be added to all of the linux machines using rpm.
Then, we must install grace from the EPEL and this will also install the correct 64 bit openmotif which is used by MEDM (Motif Editor and Display Manager). As of now, dataviewer
and DTT and MEDM are working on most machines.