5.3.9 on Debian wheezy I have obviously made a mistake when drawing up this elevation, as it is far to large. To try and get a clue I tried debug on It had compiled with debug off but gave an error with debug on (and all as well) **data.mp (mpost.mp (/usr/share/texlive/texmf-dist/metapost/base/plain.mp Preloading the plain mem file, version 1.004)) (./data.mp [4001] [4002] [4003] [4004] [4005] [4006] [4007] [4008] [4009] [4010] [4011] [4012]
(nan-47.616,nan-3.48695,1,0,0,1) ! Transform components aren't all known. <to be read again> endgroup data->...i;lab:=thelabel(SUFFIX2)((EXPR3),(EXPR4))
;if(EXPR6)>1:pickup.PenD.f... l.4815 ...char50 \mainfont{} etex,(nan,nan),0.0,6) ; I'm unable to apply a partially specified transformation except to a fully known pair or transform. Proceed, and I'll omit the transformation. debug first, station-names, second work thanks Andrew