Started the modification from 'devnull' to tempfiles.
This is as proposed by Edward d'Auvergne to catch the creation of a well formatted and non empty
tensor pdb file and was discussed in a post at:
https://mail.gna.org/public/relax-devel/2008-07/msg00029.html (message ID:
7f080ed10807081248r1f0fda8axd17768bb841efe71@...)