This is MetaPost, version 1.504 (kpathsea version 6.1.0dev) 16 MAY 2012 17:07 **smtau (mpost.mp (/usr/share/texlive/texmf-dist/metapost/base/plain.mp Preloading the plain mem file, version 1.004)) (./smtau.mp (/usr/share/texmf/metapost/feynmf/feynmp.mp) [1] ) Here is how much of MetaPost's memory you used: 454 strings using 6813 characters 824136 bytes of node memory 917 symbolic tokens 14i,71n,28p,103b,3f stack positions out of 16i,84n,32p,200b,4f 1 output file written: smtau.1