if(!isstring(PathThead),
 PathThead="";
);
PathT=PathThead+"uplatex";
if(iswindows(),
  PathS="C:\Program Files\scilab-6.0.0\bin\scilex";
  PathC="C:\MinGW\bin\gcc.exe";
  Pathpdf="C:\Program Files\SumatraPDF\SumatraPDF.exe";
  PathR="C:\Program Files\R\R-3.4.2\bin";
  PathA="C:\Program Files\asir\bin\asir";
  PathM="C:\maxima-5.37.3\bin\maxima.bat";
  PathV3="C:\Program Files\VCG\MeshLab\meshlab";
  PathF="C:\cygwin\bin";
  PathAd="C:\Program Files\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe";
);
if(ismacosx(),
  PathS="/Applications/scilab-6.0.0.app/Contents/MacOS/bin/scilab";
  Pathpdf="preview";
  PathC="gcc";
  PathR="/Library/Frameworks/R.framework/Versions/Current/Resources/bin/R";
  PathA="/Applications/cfep.app/OpenXM/rc/asir";
  PathM="/Applications/Maxima.app/Contents/Resources/maxima.sh";
  PathV3="/Applications/meshlab.app/Contents/MacOS/MeshLab";
  PathF="/Applications/FriCAS.app/Contents/Resources/bin/fricas";
  PathAd="/Applications/Adobe Acrobat Reader DC.app/Contents/MacOS/AdobeReader";
  Mackc="sh";
);
if(islinux(),
  PathS="scilab";
  Pathpdf="evince";
  PathC="gcc";
  PathR="R";
  PathA="asir";
  PathM="maxima";
  PathV3="Meshlab";
  PathF="fricas";
  PathAd="acroread";
);

if(iswindows(), //180420from
  Changesetting([gethome(), gethome()+"\Desktop","C:"]);
,
  Changesetting([gethome(),gethome()+"/Desktop"]);
);//180420to

if(indexof(PathT,"platex")>0,
  Helplist(["+","+3d","+mv"],"helpJ");
,
  Helplist(["+","+3d","+mv"],"helpE");
);

setdirectory(Dircdy);