Hello Debian wheezy. Therion 5.3.9 and 5.3.10 First some history. I was using 5.3.9, but last weekend I was running a course in Wales so needed the OSGB:SN which is added to 5.3.10. So to achieve this built 5.3.10 from source as 5.3.10 is not in wheezy due to the freeze. So when producing a pdf I get the Error 768, log attached, everything else I do seems to work as normal Wookey was there to help, so also tried installing 5.3.10 from .deb and then 5.3.9 from the .deb, both with the same error. Now in the error there is the bit that says ! Unable to make mpx file. l.2 btex \mainfont 0 etex The two files given above are one of your source files and an auxiliary file I need to read to find out what your btex..etex blocks mean. If you don't know why I had trouble, try running it manually through MPtoTeX, TeX, and DVItoMP played around with this, but really do not know what I am doing, but it might help me trace the problem. 5.3.10 worked on Wookeys Wheezy machine, so the w/e training could continue, at least. This was generated when running the thconfig file in http://www.cave-registry.org.uk/svn/CheddarCatchment/Reservoir/ Thanks Andrew