A random discovery with the new tex variable \magdecl = magnetic declination in degrees. If one uses a defined coordinate system and forgets to provide a survey date for all surveys, then there is some 'not very well trapped' undesirable behaviour. The log file produces something like this. "C:\Program Files\Therion\therion.exe: warning -- unable to determine magnetic declination for undated surveys output coordinate system: EPSG:2193 meridian convergence (deg): -0.0696 " which is appropriate behaviour, however it is followed by. " #################### end of metapost log file #################### converting scraps ... done making map ... done ######################## pdftex log file ######################### This is pdfTeX, Version 3.1415926-1.40.10 (Web2C 2009) (format=pdftex 2010.1.2) 18 JAN 2015 20:21 entering extended mode **data.tex (./data.tex (./th_enc.tex) (./th_texts.tex) (./th_resources.tex (c:/Program Files/Therion/texmf/tex/glyphtounicode.tex)) (./th_fontdef.tex{c:/P rogram Files/Therion/texmf/fonts/pdftex.map}) (./th_formdef.tex Normal \count register pool exhausted, switching to extended pool.) (./th_pagedef.tex Overfull \hbox (299.59392pt too wide) in paragraph at lines 12--12 []\thfb gridnorth -1261120821493519700000000000000000000000000000000000000000 00000000000000000000000000000000.00deg | \hbox(8.33333+2.33333)x330.05206, glue set - 1.0 .\hbox(0.0+0.0)x0.0 .\thfb g .\thfb r .\thfb i .\thfb d .etc. ) (./th_pages.tex) 253 numeric registers used out of 32768 [1] ) Here is how much of TeX's memory you used: 1706 strings out of 95617 .. " which is not so good, but at least it does produce a generally OK looking pdf (with my experimental debug like header layout). In this case it might be better to set \magdecl to a more meaningful error value. If it can take a string value then "unable to determine magnetic declination for undated surveys" is probably good. Bruce